Season 1
A one-way expedition to the lost city of Atlantis in the Pegasus Galaxy accidentally wakes the Wraith -- a fleet of life-draining aliens that immediately sets course for Earth. The season establishes the core team, the Ancient mythology, and key recurring factions like the Genii, building to a desperate last-stand finale.
9 Critical
2 Fan Fave
9 Filler
| Ep | Title / Note | Rating |
|---|---|---|
| 1x01 | Rising, Part 1Critical Series premiere -- expedition arrives in Atlantis and meets the Wraith threat for the first time. Dr. Weir leads a multinational expedition through the Stargate to the Pegasus Galaxy, landing in the submerged Ancient city of Atlantis. The city's power reserves are nearly depleted and there is no way home; Sheppard joins the team after demonstrating the Ancient gene. | |
| 1x02 | Rising, Part 2Critical Premiere conclusion -- Wraith are introduced in full and a prisoner is rescued from a Wraith hive ship. Sheppard leads a rescue mission to a Wraith hive ship to free captive Athosians, establishing the Wraith as life-draining hibernating predators. The expedition commits to staying in Pegasus, the Athosians join them in Atlantis, and the Wraith are awakened en masse. | |
| 1x03 | Hide and SeekFiller McKay gets a gene therapy upgrade and a shadow creature threatens the city's power. McKay temporarily gains the Ancient gene via experimental therapy, but a dormant creature released by Athosian children feeds on Atlantis's power. The creature is driven off; McKay's gene therapy is ultimately reversed after complications. | |
| 1x04 | Thirty-Eight MinutesFiller Tense bottle episode -- the team is stuck half-in a Stargate with Sheppard dying and a 38-minute clock. A Wraith bug latches onto Sheppard's neck and begins draining his life while the puddle jumper is stuck mid-gate with the wormhole counting down. McKay and Ford race to fix the ship manually before the gate closes and kills everyone aboard. | |
| 1x05 | SuspicionFiller Wraith spy paranoia strains relations with the Athosians; Teyla is wrongly suspected. After repeated Wraith ambushes, Weir suspects an Athosian spy and separates the two groups. The spy turns out to be an unwitting Athosian with a subcutaneous Wraith transmitter; he is removed and the Athosians relocate to the mainland. | |
| 1x06 | Childhood's EndFiller Planet of ritual suicide -- quirky alien-of-the-week with minimal arc relevance. The team crash-lands on a planet where children enforce a mandatory death-at-25 rule, believing it keeps the Wraith away. McKay discovers it is actually an Ancient ZPM-powered EM field; disabling it triggers a Wraith alarm, and they barely escape. | |
| 1x07 | Poisoning the WellFan Fave Morally complex Wraith-immunity drug storyline with genuine consequences -- good Beckett episode. The Hoffan civilization rushes a Wraith-immunity drug to mass inoculation before it is proven safe; Beckett and Sheppard are unable to stop them. The drug works but kills roughly half the test subjects, and the Hoffans accept the trade-off -- a decision with lasting in-universe consequences. | |
| 1x08 | UndergroundCritical Introduces the Genii -- a recurring antagonist faction that becomes major throughout the series. The team visits what appears to be a simple farming village but discovers the Genii are a technologically advanced militaristic society hiding underground and developing nuclear weapons. The Genii become uneasy allies who will repeatedly betray the expedition. | |
| 1x09 | HomeFiller Dream-trap episode -- the team thinks they've made it home but it is all an illusion. An alien entity on a fog-planet generates detailed hallucinations of Earth to feed off the team's contentment. They eventually realize the trick and escape; a real message is sent to Stargate Command confirming contact, but the team cannot return home. | |
| 1x10 | The StormCritical Part 1 of the mid-season standout -- Genii invade Atlantis during a monster hurricane. A massive storm forces evacuation of Atlantis; the Genii exploit the window to seize the city's nuclear weapons and take Weir and McKay hostage. Sheppard is left alone inside to fight off an entire Genii strike team while McKay races to save the city from the storm. | |
| 1x11 | The EyeCritical Part 2 -- Sheppard vs. the Genii is the season's best action sequence; storm arc pays off cleanly. Sheppard systematically eliminates the Genii invaders while McKay completes the lightning-rod plan to power the city's shield. Kolya -- the Genii commander -- becomes a recurring villain after escaping; the storm is survived and Atlantis is reclaimed. | |
| 1x12 | The Defiant OneFiller Isolated two-man Wraith hunt -- good for Sheppard and McKay character work but thin on plot. Sheppard and McKay investigate a crashed Wraith ship and are hunted by a lone Wraith who has survived for 10,000 years by feeding on his own crew. They eventually kill it; no arc consequences. | |
| 1x13 | Hot ZoneFiller Virus-outbreak procedural in Atlantis -- competent but forgettable. Scientists begin hallucinating and dying after entering an Ancient lab; McKay identifies a nanovirus and races to find the kill-switch before it spreads. The outbreak is contained; no lasting consequences. | |
| 1x14 | SanctuaryFiller Sheppard romance subplot -- a planet protected by an Ascended Ancient who can't share her sanctuary. The team finds a Wraith-free planet protected by Chaya, who turns out to be an Ascended Ancient forbidden from sheltering others. She and Sheppard share a brief connection before she departs; the expedition gains no sanctuary. | |
| 1x15 | Before I SleepFan Fave Time-loop mythology gem -- elderly alternate-Weir reveals how Atlantis was actually saved at the start. The team finds an aged Dr. Weir in stasis who explains she traveled back 10,000 years and warned the Ancients, enabling the city to be preserved -- essentially retroactively explaining how the expedition survived Rising. A tight, well-crafted mythology episode that recontextualizes the series opener. | |
| 1x16 | The BrotherhoodFiller ZPM treasure hunt on Dagan -- the Genii steal it at the finish line. The team follows an Ancient trail to a hidden ZPM, but a Genii sleeper agent ensures Cowen's forces take it at the last moment. The expedition comes away empty-handed; the ZPM thread remains unresolved. | |
| 1x17 | Letters from PegasusCritical Pre-finale pivot -- the Wraith armada is confirmed en route and the team sends last messages to Earth. Having spotted a massive Wraith fleet heading for Atlantis, the team uses a rare power window to transmit a data burst to Earth including intel and personal messages. Sheppard and Teyla witness a full Wraith culling firsthand; the clock is now ticking on the season finale. | |
| 1x18 | The GiftCritical Teyla's Wraith connection is explained -- key mythology and character backstory before the finale. Teyla's recurring nightmares lead to the discovery that she carries a small amount of Wraith DNA from ancient experimentation, giving her the ability to sense and even communicate with the Wraith. This ability becomes a double-edged asset going into the siege. | |
| 1x19 | The Siege, Part 1Critical Siege Part 1 -- desperate last-ditch preparations as the Wraith fleet closes in on Atlantis. McKay's team attempts to restore an Ancient weapons satellite as a first line of defense while paranoia over Teyla's Wraith link strains the team. The satellite is brought online but sabotaged; most of the defense plan falls apart before the fleet even arrives. | |
| 1x20 | The Siege, Part 2Critical Season finale -- the Wraith assault Atlantis and the cavalry arrives from Earth just in time. Atlantis is overrun; the team arms the self-destruct and makes a final stand with unlikely Genii reinforcements. Earth dispatches the battleship Daedalus with a ZPM, arriving at the last possible moment to turn the tide -- ending on a cliffhanger that sets up Season 2. |
Season 2
Season 2 brings Ronon Dex aboard as the team's new muscle and builds toward an uneasy alliance with the Wraith, anchored by Beckett's retrovirus storyline and the disturbing introduction of Michael. It's an uneven season with stretches of filler, but the mythology episodes -- Michael, The Hive, and Allies -- land hard.
8 Critical
3 Fan Fave
9 Filler
| Ep | Title / Note | Rating |
|---|---|---|
| 2x01 | The Siege, Part 3Critical High-stakes siege conclusion that delivers the Daedalus cavalry and sets up the season's deception arc. The Daedalus arrives in time to repel the Wraith fleet, but the team is forced to fake Atlantis's destruction to buy safety. Ford disappears after a desperate choice, and the season's central lie -- that Atlantis is gone -- is established. | |
| 2x02 | The IntruderFiller Wraith computer virus on the Daedalus is a competent bottle episode but doesn't move the needle. A Wraith virus hijacks the Daedalus's systems on the voyage back to Atlantis. McKay defeats it. The crew returns to Atlantis intact -- nothing that follows depends on this episode. | |
| 2x03 | RunnerCritical Ronon Dex's introduction -- Jason Momoa's breakout moment and a genuine shot of energy for the team. Tracking the AWOL Ford, the team encounters Ronon -- a 'Runner' who has been hunted by the Wraith for seven years. Ford escapes deeper into his addiction. Ronon is brought back to Atlantis and eventually joins the team. | |
| 2x04 | DuetFan Fave Two personalities sharing McKay's body is peak comedic SGA -- Hewlett is genuinely excellent here. McKay and Lt. Cadman get merged into McKay's body after a transporter accident. While Zelenka works on a fix, Cadman hijacks McKay's body for a date with Beckett. Lightweight but one of the funniest episodes the show ever produced. | |
| 2x05 | CondemnedFiller Bland planet-of-the-week about a society feeding prisoners to the Wraith -- no lasting consequences. The team discovers a civilization that has cut a deal with the Wraith: criminals on a prison island get culled in exchange for the mainland being left alone. They expose the arrangement and leave. Nothing here carries forward. | |
| 2x06 | TrinityFan Fave McKay's hubris blows up a solar system -- a rare character-damaging failure that actually sticks. McKay insists he can complete an Ancient energy experiment the Ancients themselves abandoned, despite all warnings. He is wrong: the result is the destruction of a three-fourths of a solar system and a serious rupture with Ronon and Sheppard. One of McKay's defining episodes for better and worse. | |
| 2x07 | InstinctFiller Setup episode for Conversion -- watchable Wraith-girl horror, but only matters for the next episode. The team finds a Wraith-girl named Ellia raised by a human father who has been dosing her with Beckett's retrovirus. The retrovirus is incomplete and mutates Ellia into a more feral creature; she bites Sheppard before being killed. Watch this if you plan to watch 2x08. | |
| 2x08 | ConversionFiller Sheppard slowly turns Iratus bug -- body horror that resolves without lasting consequences. Ellia's bite triggers the retrovirus in Sheppard, gradually mutating him toward an Iratus bug-like state. Beckett synthesizes a cure in time. Sheppard is fine by episode end; the episode is self-contained. | |
| 2x09 | AuroraFiller Solid Ancient ship mystery with a good Wraith twist, but stands alone with no arc payoff. The team boards the derelict Ancient warship Aurora and jacks into a virtual reality where its crew is still fighting a 10,000-year-old battle. A Wraith spy in the simulation has been feeding the Wraith false coordinates -- the team destroys the ship before the Wraith can retrieve the real data. | |
| 2x10 | The Lost BoysCritical Ford's final arc begins -- a grim, effective two-parter that closes out that character thread. Ford -- now leading a band of enzyme-addicted warriors -- captures the team and forces them onto a suicide mission against a Wraith hive ship. This is the first half of a two-parter; watch alongside 2x11. | |
| 2x11 | The HiveCritical Ford's story ends and the Wraith civil war kicks off -- one of the season's best mythology episodes. The team escapes the hive ship as Ford apparently dies in an explosion, closing his arc. More importantly, the mission reveals a factional rift among the Wraith -- a civil war is beginning, which will define the back half of the season and feed directly into the Allies finale. | |
| 2x12 | EpiphanyFiller Sheppard-trapped-in-a-time-bubble is a decent high-concept standalone, elevated by good character work. Sheppard enters an Ancient portal and is trapped in a pocket where time moves much faster -- he ages years while only hours pass outside. He eventually escapes via Ancient meditation techniques. Nothing carries forward. | |
| 2x13 | Critical MassCritical The Trust/Goa'uld spy plot delivers the season's best Earth-side intrigue and has a real body count. The Trust has planted a mole in Atlantis with orders to destroy the city via a bomb triggered by any gate-dial to Earth. The mole is revealed and neutralized, but the episode expands the threat picture beyond the Wraith and has lasting Caldwell consequences. | |
| 2x14 | Grace Under PressureFan Fave McKay trapped in a sinking Jumper with a hallucinated Samantha Carter -- a tight, character-rich bottle episode. McKay and a pilot crash a Jumper to the ocean floor. With the pilot unconscious and air running out, McKay hallucinates Carter as a sounding board while engineering his own rescue. A showcase episode for Hewlett with genuine tension. | |
| 2x15 | The TowerFiller Atlantis doppelganger tower with a harem subplot -- goofy and fun but inconsequential. The team finds an Ancient-built tower that functions like Atlantis, ruled by a 'Lord Protector' who has been defending the locals against the Wraith using its drone weapons. The team helps depose him and secures the tower's ZPM. Lightweight but not painful. | |
| 2x16 | The Long GoodbyeFiller Alien consciousness body-swap action romp -- formula sci-fi done fine but forgettable. Energy beings from ancient pods possess Weir and Sheppard, turning them into enemies who try to kill each other across Atlantis. The beings are expelled. The episode is entirely self-contained. | |
| 2x17 | Coup d'EtatCritical Genii coup politics and a ZPM acquisition that reshapes Atlantis's strategic situation. Ladon Radim overthrows Genii leader Cowen and offers the team a ZPM in exchange for weapons and support. They broker the deal; Cowen dies. Ladon becomes the new (more stable) Genii leader -- a recurring ally-antagonist going forward -- and Atlantis gains a ZPM. | |
| 2x18 | MichaelCritical Michael's introduction is one of the series' best conceits -- a Wraith who doesn't know he's a Wraith. Beckett's retrovirus has turned a Wraith into a human, who wakes in Atlantis believing he is a human soldier named Michael Kenmore with no memory. As he starts to recover his identity, the team's ethical compromises are exposed. Michael is a recurring villain from here on -- this episode is essential. | |
| 2x19 | InfernoFiller Disaster-movie episode on a supervolcano planet -- watchable action with a superfluous Ancient ship tease. The team visits a planet where Ancients left a base; a supervolcano is about to erupt and destroy the civilization. McKay helps evacuate the population through the Stargate while the team barely escapes. Nothing carries forward. | |
| 2x20 | AlliesCritical Season finale with a Wraith alliance and a cliffhanger betrayal -- the Wraith civil war pays off here. Michael returns representing a Wraith faction that wants Beckett's retrovirus to use as a weapon against rival hives. The team agrees to cooperate; they board a hive ship to help synthesize the virus. The Wraith betray them mid-mission, capturing the team and leaving Atlantis defenseless -- hard cliffhanger into Season 3. |
Season 3
Season 3 raises the stakes by introducing the Asurans -- Pegasus-galaxy Replicators -- as a lethal new threat that ultimately forces the Atlantis team off their own city. The season closes with a tense cliffhanger as Atlantis faces annihilation and Elizabeth Weir's fate hangs in the balance.
7 Critical
4 Fan Fave
9 Filler
| Ep | Title / Note | Rating |
|---|---|---|
| 3x01 | No Man's LandCritical Explosive continuation of the S2 finale -- Wraith hive ships en route to Earth. Sheppard is aboard a Wraith hive ship headed for Earth while the Daedalus and the crippled Orion race to intercept. The temporary Wraith alliance collapses and Weir is called back to Earth to answer for her team's decisions. | |
| 3x02 | MisbegottenCritical Wraith-retrovirus arc wraps up; Weir's leadership is formally reviewed by the IOA. The team returns to Atlantis with a hive ship full of Wraith-turned-humans in stasis, unsure what to do with them. Woolsey conducts an IOA review of Weir's command -- she survives it, but the tension foreshadows her later removal. | |
| 3x03 | IrresistibleFiller Lucius the con-man returns; lightweight comedy that doesn't land as well the second time. The team encounters Lucius again -- now without his pheromone herb -- conning a village with stolen Atlantis stories. Nothing plot-relevant happens; Lucius leaves and the team moves on. | |
| 3x04 | SatedaFan Fave Ronon's backstory and homeworld get a brutal, action-heavy spotlight episode. A village hands Ronon over to the Wraith to protect themselves; the Wraith dump him on the ruins of Sateda to hunt him for sport. Sheppard's team rescues him in a standout action episode that deepens Ronon significantly. | |
| 3x05 | ProgenyCritical First appearance of the Asurans -- the show's defining new threat for seasons 3 and 4. The team discovers a city of Ancients who turn out to be Asurans -- Replicators engineered by the Ancients in the Pegasus galaxy. Oberoth captures and nearly kills the team; this episode establishes the Asurans as a top-tier threat. | |
| 3x06 | The Real WorldFiller Weir-centric bottle episode -- interesting character work undermined by a predictable structure. Weir wakes in a psychiatric hospital, convinced her life in Atlantis was a delusion -- in reality she is trapped in an Asuran-induced virtual reality. The team breaks her out; the episode is a decent Weir showcase but skippable. | |
| 3x07 | Common GroundFan Fave Sheppard is fed on by a Wraith to survive -- one of the series' best character episodes. Kolya captures Sheppard and has a Wraith named Todd feed on him repeatedly as leverage. Sheppard survives only because Todd feeds him life-force in return -- establishing the recurring Todd relationship that matters for the rest of the series. | |
| 3x08 | McKay and Mrs. MillerFan Fave McKay's sister Jeannie is introduced -- strong character dynamic and a clever parallel-universe premise. McKay recruits his estranged sister Jeannie for a parallel-universe energy experiment that goes wrong and traps an alternate McKay. Jeannie becomes a recurring character; the sibling chemistry is a genuine series highlight. | |
| 3x09 | PhantomsFiller Hallucination-driven action episode -- competent but forgettable mid-season filler. A Wraith device emitting a fear/hallucination field causes Sheppard's team to turn on each other while searching for a missing unit. The team destroys the device and escapes; no lasting consequences. | |
| 3x10 | The Return, Part 1Critical The Ancients return and evict the Atlantis team -- major status-quo shift and Asuran setup. Awakened Ancients reclaim Atlantis and order the entire Earth team to leave. O'Neill and Woolsey stay behind as diplomatic observers -- just in time for the Asurans to launch a coup and massacre the Ancient population. | |
| 3x11 | The Return, Part 2Critical The team goes rogue to retake Atlantis from the Asurans -- satisfying conclusion to a strong two-parter. O'Neill and Woolsey hide in Atlantis while the Asurans hold the city; the team defies orders and launches an unauthorized rescue/retake operation. Atlantis is reclaimed and the team is officially reinstated -- the Asurans are confirmed as a standing enemy. | |
| 3x12 | EchoesFiller Whale-migration subplot and Ancient ghost visions -- pleasant but inconsequential. Teyla sees Ancient apparitions while space whales converge on Atlantis, drawn by a solar event. The team manages to protect the city; nothing carries forward. | |
| 3x13 | IrresponsibleFiller Lucius again -- this one is a full parody that wears thin quickly. Lucius has been posing as a hero using Sheppard's team's exploits and stumbles into actual danger with the Genii. The team bails him out; entirely skippable. | |
| 3x14 | Tao of RodneyFan Fave McKay gains ascension-level powers and faces mortality -- genuinely moving character episode. An Ancient device gives Rodney enhanced mental and physical abilities but is slowly killing him; he uses his remaining time to help others and say goodbye. He is saved at the last moment, but the episode is one of McKay's best showcases. | |
| 3x15 | The GameFiller McKay and Sheppard accidentally turned an Atlantis strategy game into a real civilization simulator -- fun concept. A game the duo played on Atlantis has been secretly directing two real civilizations, which are now on the brink of war because of their decisions. They have to broker peace; a light, clever episode with no lasting consequences. | |
| 3x16 | The ArkFiller Interesting premise -- a civilisation preserved in a moon ark -- but execution is flat. The team finds a hollowed-out moon housing the last survivors of a Wraith-culled civilization held in stasis. A malfunction threatens the ark; the team saves the survivors and helps them relocate. | |
| 3x17 | SundayCritical Carson Beckett is killed -- a genuine gut-punch that permanently changes the show's tone. On a mandatory day off, a series of mysterious explosions rocks Atlantis; Dr. Carson Beckett dies shielding others from a secondary blast. His death is a major emotional event for the cast and audience -- this episode is essential viewing. | |
| 3x18 | SubmersionFiller Underwater drilling station, a trapped Wraith queen -- solid atmosphere, routine plot. The team explores an Ancient geothermal drilling rig on the ocean floor and discovers a Wraith queen in stasis. She briefly takes control of Teyla; the team destroys the queen and escapes. | |
| 3x19 | VengeanceFiller Michael resurfaces with a Wraith-bug hybrid army -- moves his arc forward slightly. The team investigates the missing Taranan settlement and finds Michael has been using them as test subjects for a new Wraith-bug hybrid creature. They destroy the complex; Michael escapes and his ongoing arc continues. | |
| 3x20 | First StrikeCritical Season finale -- Asurans beam a weapon at Atlantis; the city must flee into space with Weir critically wounded. After a preemptive strike on the Asuran shipyards, the Replicators retaliate with a satellite weapon that forces Atlantis to lift off and jump to hyperspace. Weir is gravely injured by an Asuran energy blast, setting up her critical arc in Season 4. |
Season 4
Season 4 resets the command structure with Samantha Carter taking the reins as Atlantis fights a two-front war -- eliminating the Replicators in a spectacular mid-season climax while Michael emerges as a self-sufficient villain threatening Teyla and the wider galaxy. The back half shifts toward the Wraith threat and a gut-punch cliffhanger finale.
8 Critical
3 Fan Fave
9 Filler
| Ep | Title / Note | Rating |
|---|---|---|
| 4x01 | AdriftCritical High-stakes season opener with Atlantis adrift and critically damaged after the S3 cliffhanger. Atlantis is lost in space with a failing shield after the Replicator attack that ended Season 3. McKay strips the city down to bare essentials to survive while the team scrambles for a solution. | |
| 4x02 | LifelineCritical Daring Replicator homeworld heist resolves the premiere and formally installs Carter as commander. Sheppard's team infiltrates the Replicator planet to steal a ZPM and restore Atlantis's power. Carter arrives aboard the Apollo and assumes command of the expedition, replacing the lost Weir. | |
| 4x03 | ReunionFiller Ronon backstory episode -- enjoyable but narratively disposable. Ronon reunites with surviving Satedans who turn out to be Wraith worshippers. He kills them and chooses his Atlantis family over his past. | |
| 4x04 | DoppelgangerFiller Alien crystal entity causes nightmare-vision monster-of-the-week; forgettable. Sheppard picks up an alien entity on a jungle world that spreads through touch and gives people terrifying nightmares. The entity is eventually forced out and destroyed. | |
| 4x05 | TravelersFiller Fun Sheppard-centric adventure introducing the Travelers, a new recurring faction. Sheppard is kidnapped by the Travelers, a nomadic human fleet that avoids Wraith culling by staying in hyperspace. He helps them activate an Ancient warship and earns a wary alliance. | |
| 4x06 | Tabula RasaFiller Clever amnesia-virus episode with an inventive non-linear structure -- better than average filler. A virus wipes the memory of nearly everyone on Atlantis. McKay wakes zip-tied to his desk with cryptic notes on his arm and has to piece together what happened and find a cure. | |
| 4x07 | MissingFiller Teyla/Keller survival episode that seeds the Athosian disappearance arc. Teyla and Keller arrive on New Athos to find the Athosians gone and a hostile tribe hunting them. They survive; the missing Athosians are left unresolved, feeding later Michael plot threads. | |
| 4x08 | The SeerCritical Todd the Wraith introduced as an uneasy ally -- major recurring character debut. A dying prophet shows the team visions of Atlantis's destruction, and a Wraith named Todd arrives offering intelligence. Todd becomes a reluctant ally; the Replicator threat is escalated. | |
| 4x09 | Miller's CrossingFiller Earth-set kidnapping story is a serviceable McKay family episode with a dark moral twist. McKay's sister Jeanie is abducted by a dying billionaire who needs her nanite expertise to save his life. McKay is forced to infect her with Replicator nanites, then struggle to remove them. | |
| 4x10 | This Mortal CoilCritical Replicator duplicate twist reintroduces Elizabeth Weir in a key mythology setup episode. A drone leads the team to a planet where Replicator copies of themselves have been living, including a copy of Elizabeth Weir. The duplicate team provides intelligence on the Replicator collective before self-destructing. | |
| 4x11 | Be All My Sins Remember'dFan Fave The Replicator war ends in a massive fleet battle -- one of the best action episodes in the series. Atlantis, the Wraith, and the Traveler fleet unite against the Replicators. Weir's duplicate sacrifices herself to collapse the Replicator collective, and a combined assault destroys the homeworld in a spectacular climax. | |
| 4x12 | Spoils of WarCritical Post-Replicator fallout pivots to Michael's independent threat; Teyla pregnancy revealed. The team salvages a Hive ship and discovers Michael has been secretly breeding a Wraith army. Teyla reveals she is pregnant, and Michael's growing autonomy is established as the new season threat. | |
| 4x13 | QuarantineFiller Entertaining bottle episode with character-pairing charm -- Sheppard/Teyla, McKay/Zelenka, Carter/Radek. A false biosign triggers city-wide quarantine, trapping the crew in separate sections. Several character relationship moments play out; everyone escapes with no major plot consequence. | |
| 4x14 | HarmonyFiller Light comedic outing with Sheppard and McKay babysitting a princess -- inconsequential fun. Sheppard and McKay escort a young princess through a rite-of-passage forest trek. She turns out to be clever enough to use an Ancient weapon, and a small portrait of McKay ends up displayed in the royal hall. | |
| 4x15 | OutcastFiller Sheppard Earth-set episode with rare backstory detail; runaway Replicator subplot is minor. Sheppard returns to Earth for his father's funeral and uncovers a rogue private program that created a Replicator-human hybrid. He shuts it down; the episode gives rare glimpse into his estranged family. | |
| 4x16 | TrioFan Fave Charming three-hander with Carter, McKay, and Keller trapped underground -- sharp character comedy. Carter, McKay, and Keller fall into an abandoned mining pit and must engineer their way out using limited resources. The episode is a fan favorite for its banter, character dynamics, and Jewel Staite's performance. | |
| 4x17 | MidwayFan Fave Ronon and Teal'c team-up to repel a Wraith attack on the SGC -- crowd-pleasing crossover action. Teal'c visits Atlantis to coach Ronon before his IOA interview. Wraith infiltrate the Midway station and reach the SGC; Ronon and Teal'c fight their way through both facilities and secure the gate. | |
| 4x18 | The Kindred, Part 1Critical Michael's master plan kicks into gear -- the Teyla abduction arc reaches crisis point. A mysterious plague sweeping the galaxy is traced to Michael, who has been harvesting Wraith and humans for his hybrid experiments. Teyla is captured by Michael, who has a specific interest in her unborn child. | |
| 4x19 | The Kindred, Part 2Critical Carson Beckett returns (as a clone) -- emotional payoff and critical Michael arc escalation. The team discovers Carson Beckett alive -- actually a Michael-created clone used to develop the plague. They rescue him but fail to retrieve Teyla, who remains Michael's prisoner as the season enters its finale. | |
| 4x20 | The Last ManCritical Acclaimed time-jump finale -- bleak alt-future shows the cost of failure and sets up Season 5. Sheppard is catapulted 48,000 years into the future and finds Atlantis abandoned and humanity losing the war. A hologram of an aged McKay walks him through a bleak timeline and sends him back with a plan to save Teyla and alter the future. |
Season 5
Atlantis's final season brings Richard Woolsey in as a surprisingly effective new commander while Michael's hybrid army threat reaches its violent conclusion -- then pivots to a Wraith super-hive threatening Earth itself. Deeply uneven but bookended by some of the show's all-time best episodes, including the standout character piece 'The Shrine' and the gonzo alternate-reality experiment 'Vegas'.
7 Critical
2 Fan Fave
11 Filler
| Ep | Title / Note | Rating |
|---|---|---|
| 5x01 | Search and RescueCritical Strong season opener resolves the S4 cliffhangers and delivers Teyla's baby. The team rescues Sheppard and Ronon from Michael's collapsed compound, then extracts Teyla from Michael's hive ship just as she gives birth to her son Torren. Woolsey arrives to take command of Atlantis. | |
| 5x02 | The SeedFiller Keller-as-alien-host bottle episode; reintroduces Beckett as a regular. An alien organism uses Keller as a biological anchor to interface with Atlantis's systems. Beckett -- now back as a recurring presence -- synthesizes a cure before the organism can propagate through the city. | |
| 5x03 | Broken TiesFiller Ronon capture-and-rescue with some wraith-enzyme drama; decent but forgettable. A former Runner friend named Tyre lures Ronon into a Wraith trap and he is subjected to culling-enzyme conditioning. The team tracks him down and Tyre sacrifices himself to help free Ronon. | |
| 5x04 | The Daedalus VariationsFiller Fun alternate-reality adventure; self-contained and surprisingly entertaining. The team boards a crewless duplicate Daedalus whose drive keeps jumping them through alternate universes -- a sun-scorched reality, an alien invasion timeline, a version where Atlantis has fallen. They figure out the pattern and jump home. | |
| 5x05 | Ghost in the MachineFiller FRAN / Replicator closure episode that doesn't fully satisfy. A digital consciousness believed to be the destroyed Replicator Weir contacts Atlantis and begs for bodies to inhabit. Woolsey refuses and the entities disperse -- a melancholy but anticlimactic farewell to the Weir arc. | |
| 5x06 | The ShrineFan Fave McKay's best episode -- devastating and emotionally honest in a way SGA rarely attempts. McKay contracts Second Childhood, a disease that rapidly degrades his mind. The team takes him to a shrine that temporarily restores his faculties so he can say goodbye to Jeannie and Keller, knowing he will regress and die. One of the series' emotional high points. | |
| 5x07 | WhispersFiller B-movie horror homage with creepy Michael experiments; thin but atmospheric. Sheppard's team and a Beckett-led medical squad investigate a Michael lab on a fog-shrouded planet and get stalked by grotesque hybrid creatures in the dark. No plot relevance -- just a horror bottle episode. | |
| 5x08 | The QueenCritical Teyla-goes-undercover as a Wraith Queen -- key setup for the Todd alliance arc. To broker a deal that would make Wraith stop feeding on humans, Teyla disguises herself as a Wraith Queen and infiltrates Todd's hive. The deal is secured but the Wraith Queen Todd serves under is killed, reshaping the power balance and setting up later episodes. | |
| 5x09 | TrackerFiller Tight chase thriller with strong Ronon/Keller/Rodney dynamic; above average filler. A Wraith kidnaps Keller to steal her gene therapy research. Ronon and McKay pursue through a village, with a Hunter Wraith also closing in. Keller and Ronon form a closer bond. | |
| 5x10 | First ContactCritical Part one of the mid-season two-parter -- Daniel Jackson crossover and the Asgard-descendants reveal. Daniel Jackson visits Atlantis and he and McKay discover a hidden lab built by the rogue Ancient Janus. Activating it summons the Vanir -- a splinter group of Asgard who survived in Pegasus -- who kidnap McKay and Jackson and threaten to use an Ancient weapon that would destroy all Wraith hyperdrive-capable ships -- and kill billions of humans in the process. | |
| 5x11 | The Lost TribeCritical Part two pays off cleanly; resolves the Vanir arc and delivers a strong space battle. McKay and Jackson try to disable the Attero device from inside while Sheppard and the Daedalus fight off the Vanir ship. The device is destroyed; the Wraith Todd escapes after sabotaging Atlantis's hyperdrive, setting up tension for later in the season. | |
| 5x12 | OutsidersFiller Beckett-centric moral episode; above average but skippable if you know the Hoffan plague premise. Beckett and the team protect Hoffan plague survivors from being handed over to the Wraith by a frightened village. The survivors escape and are resettled; Beckett continues his travels through the galaxy tending to Michael's victims. | |
| 5x13 | InquisitionFiller Clip-show-adjacent courtroom episode; tedious and largely a waste of runtime. A coalition of Pegasus worlds puts Sheppard's team on trial for crimes including the Replicator attack on the Wraith and numerous collateral disasters. They are found guilty but escape. No lasting consequences. | |
| 5x14 | The ProdigalCritical Michael's final appearance and death -- a satisfying end to the season's longest-running villain. Michael seizes Atlantis's gate room using Teyla's son as leverage and attempts to take control of the city. Teyla confronts him personally and kicks him off a balcony to his death. Michael is definitively finished as a threat. | |
| 5x15 | RemnantsFiller Woolsey character work is the highlight; Sheppard subplot involves an old enemy and is the weaker half. An IOA official arrives to evaluate Woolsey's fitness for command, forcing him to navigate bureaucratic pressure. Simultaneously, Sheppard is captured by a hallucination-inducing alien intelligence -- actually a dying Ancient AI seeking contact. Both plots resolve without lasting consequence. | |
| 5x16 | Brain StormFiller Light McKay/Keller rom-com on Earth; charming and well-acted but completely inconsequential. McKay attends a demonstration by a rival scientist who has independently developed a device to solve Earth's energy crisis -- which goes catastrophically wrong. McKay saves the day and the relationship with Keller becomes official. | |
| 5x17 | InfectionCritical Todd's hive infected by Keller's gene therapy -- sets up the super-hive threat for the finale. A Wraith hive broadcasting a distress signal turns out to be Todd's ship, whose crew is dying from the gene therapy gone wrong. Atlantis helps contain the outbreak, but a faction of survivors escapes in a ship that has been fed ZPM power -- creating the super-hive that drives the finale. | |
| 5x18 | IdentityFiller Body-swap episode with Keller; competent but the premise has been done better elsewhere. Keller's consciousness is swapped into the body of a Pegasus thief named Neeva who is facing execution. Keller has to survive while the team figures out what happened and tracks down her actual body. | |
| 5x19 | VegasFan Fave Brilliant alternate-reality noir -- one of the most creative and visually distinct episodes in the Stargate franchise. In an alternate-universe Las Vegas, a burnt-out Detective Sheppard investigates a string of desiccated corpses and stumbles onto a lone Wraith that has been hiding on Earth for years. He stops the Wraith from signaling its fleet but is mortally wounded in the process -- and his transmission leaks to the main timeline, alerting the Wraith to Earth's location and triggering the finale. | |
| 5x20 | Enemy at the GateCritical A satisfying if rushed series finale -- lands the emotional beats even if the plot is breathless. The ZPM-powered super-hive jumps directly to Earth and overwhelms its defenses. Atlantis raises its shields, disengages from the ocean floor, and hyperdrives to Earth, destroying the hive ship in a final battle before landing in San Francisco Bay. The city remains on Earth -- an open ending that leaves room for the planned (but never produced) movie. |