John Crichton is an astronaut whose mission is to fly a module through the Earth's atmosphere and try to make the module gain speed. Something goes wrong and he is sucked through a wormhole. He is "saved" by some escaping prisoners and now has a race called peacekeepers chasing him.
Crichton finds himself on a world that has never encountered alien life before, and must enlist the help of a local scientist and her son to save Moya.
Alien life forms board Moya, and begin replicating the crew. Their problems escalate when a Peacekeeper squadron boards the ship.
Rygel is kidnapped by well-armed soldiers, who hold him for ransom. The crew must rescue him and Moya but soon succomb to the drug-induced effects of the Tavlek's weaponry.
Crichton jumps back in time over and over again, and discovers that a scientist who has come on board is hiding a dangerous secret.
D'Argo goes into Luxan hyper-rage, and the crew follows him to a worker planet. All is not as it seems, and John must avoid the natives' mind control to reveal a Peacekeeper plot.
Moya and her crew discover an abandoned Peacekeeper cruiser, with a sole technician on board. Aeryn and Crichton must defend the ship from a Shiang attack, while Rygel confronts a ghost from his past.
An evil wizard pits Crichton against Crais in a challenge to the death, and Zhaan embraces her submerged dark side to save her friends.
A geneticist offers the crew maps back to their own worlds -- but with a high price. Meanwhile, Aeryn Sun begins a bizarre metamorphosis.
Removing a Peacekeeper shield from Moya's internal systems blows D'Argo into space, and causes him to hallucinate about his past. Pilot also falls victim to mysterious changes in Moya.
D'Argo is captured and tortured by bounty hunters. Crichton and Aeryn must impersonate fellow bounty hunters in order to save him.
Moya finds a Delvian colony, where the inhabitants' lack of discipline are leading them to embrace their dark impulses. The crew struggle with hallucinations of people from their past, while Zhaan is betrayed by her people.
John and Aeryn are trapped in an energy net, and D'Argo must join forces with an irreputable pilot to rescue them.
Believing Moya has abandoned him, Crichton finds himself stranded on an alien world, and catches the eye of the daughter of the local ruler. When the crew finds him, Rygel is mistaken for the people's legendary savior.
The Nebari bring aboard a familiar face -- Captain Durka, Rygel's former captor and tormentor -- along with a theif named Chiana. Durka has been brain wiped and reformed, but his Nebari guide turns up dead.
Crichton finds a wormhole that returns him to Earth. When his alien friends are forced to follow, John must watch as the government imprisons and studies them.
A failed starburst attempt fragments Moya into different dimensions, and traps her. Crichton must travel between each dimension and find a way to free the ship.
Crichton impersonates a Peacekeeper captain when a PK commando unit boards the ship. But when their secret cargo escapes, no one on board is safe.
Crichton and Chiana infiltrate a Peacekeeper base to save Aeryn's life. When the base commander catches him and signals Captain Crais, Crichton learns that his brain contains the very thing for which he's been searching.
Scorpius attempts to extract the wormhole technology from Crichton's brain, while Aeryn mounts a rescue operation. Captain Crais finds himself at Scorpius' mercy, and Moya gives birth.
Hiding from Scorpius, the crew finds a world with a dangerous young woman and a scientist who isn't telling the whole truth.
Crichton and D'Argo embark on a suicide mission to destroy Scorpius' Gammack Base and allow Moya to escape. Scorpius forces Crais to make a bold move against the Peacekeepers.
Officer Sun makes an unlikely alliance to save John and D'Argo, while Scorpius continues his pursuit. Moya goes in search of her newborn, a warship now under the control of Captain Crais.
D'Argo encounters a Luxan priestess who is nearing death, until she discovers a way to reverse her aging.
Chiana joins a group of reckless thrillseekers when she learns that her brother has died.
An alien scientist uses Moya for his own scheme, while the starved crew become overly suspicious of one another.
Pilot and Aeryn must relive their dark pasts when it comes to light that the former Peacekeeper officer helped to execute Moya's first pilot.
Maldus returns to torment the crew, convincing them that their friends have perished. One by one, the evil sorcerer drags them into his realm.
When Zhaan's health fails due to malnutrition, the crew looks for help at a mining colony. Aeryn and Pilot work to save Moya from Zhaan's spores.
Zhaan is framed and put on trial for murder, and Chiana and Rygel must defend her. Desperate to find Talyn, Moya wishes to leave them on the planet and continue her search.
An accident causes the crew to switch bodies with each other, while Zhaan tries to keep an alien ship from firing on Moya.
An alien object clones Crichton, creating a highly advanced version and an unevolved beast version. One must sacrifice himself to save the ship.
Crichton is manipulated into asking an alien princess to marry him, in order to avoid Scorpius' clutches.
Crichton goes to great lengths to avoid getting killed, but finally consents to marry Princess Katralla and be turned into a living statue for 80 cycles.
Prince Clavor and his Scaran associate move against Crichton, beheading his statue. The crew must save John and Chiana while escaping Scorpius.
Chiana brings aboard a parasite-eating Vorc when the crew suspects that their food has become contaminated. Crichton struggles with hallucinations as they search for the creature.
Crichton wakes up and finds himself back on Earth -- or so someone would have him believe. He refuses to fall for the ploy, especially when his alien friends begin showing up.
A temporal distortion traps Aeryn and John on a planet's surface, where they live out the rest of their lives -- while Moya remains trapped in orbit, experiencing only hours. Stark returns to the ship with news of D'Argo's son.
When Talyn destroys a Plokavian ship, Moya's crew is put on trial for murder. Each one recalls the events from their own unique point of view.
The Nebari come looking for Chiana, and mind-cleanse her friends on Moya. Chiana makes a startling discovery about her brother, and about her people.
Stark returns with a plan to save D'Argo's son: rob a high security bank and use the money to purchase Jothee's lot of slaves.
Crichton and company raise a team of mercenaries to help them rob the shadow depository, while Scorpius closes in on his prey. Zhaan makes a desperate move to save Moya from an infestation.
Crichton gives himself up to Scorpius so that his brain implant can be removed, and the crew launch a final assault on the shadow depository to rescue him.
When Crichton goes to a medical expert to have Scorpius' brain implant removed, it takes over his body, and the crew suffers a tragic loss.
D'Argo and Stark try to heal John, left with his head open on an operating table, while Scorpius attempts to avoid discovery. Zhaan makes a great personal sacrifice, while Jothee and Chiana commit an indiscretion.
A storm traps Moya in the docking clamps of a commerce station, and D'Argo (reeling from betrayal) risks his life to free her.
A wormhole accident fuses Moya with an alien ship, threatening her life. The crew must decide whether or not to abandon the ship in order to survive
Moya's crew must escape the aliens and the deady wormhole when they discover that the ship's dire situation was caused by sabotage. One of the crew makes a sacrifice to save the rest.
A tear in the fabric of time sends Crichton and his friends into the past, where they inadvertantly alter an important moment in Peacekeeper history.
D'Argo, John, Chiana and Jool are forced to land on an abandoned Leviathan, and are preyed upon by a brain-sucking psychopath who has taken over the ship and turned its crew into flesh-eating zombies. Moya finds Talyn adrift, with Crais unconscious on board.
The crew must travel to a planet to obtain medicine for Talyn, and learn that a Peacekeeper Retrieval Squad is hunting him. Aeryn learns the truth about her past.
A giant Budong swallows Talyn, and tempers flare between Crichton, Crais and Aeryn as they attempt to find a means of escape. Aeryn makes a decision that could change her life forever.
The crew must discover which of them has been possessed by a parasitic Energy Rider, before the being that has come to find it kills them all. Meanwhile, Scorpius finds a deadly problem with his wormhole research.
Aeryn must face her mother when the Peacekeeper Retrieval Squad catches up with them. Crichton discovers that Talyn isn't the only one the Peacekeepers are after.
When Scorpius runs into trouble decoding the wormhole technology taken from Crichton's brain, he appeals to John for an alliance -- offering to reveal his own shrouded past.
Crichton, Aeryn and Crais struggle to override Talyn when the ship suddenly begins flying into a star.
When Moya's crew visits a pleasure planet for shore leave, Crichton and D'Argo are taken advantage of -- and learn that Jool and Chiana have been captured to have their essence harvested.
Crichton is reunited with the Ancients when an old acquaintance unlocks the secret of wormhole technology -- threatening the entire galaxy should the Scarrans acquire it. Talyn and Crais are blinded by a solar flare, while John attempts to force Scorpius' neural clone from his mind.
Crichton and Aeryn race to construct a powerful weapon to fight an approaching Scarran Dreadnaught, poised to claim powerful wormhole technology that could help them conquer the galaxy. Crais and Stark deal with a Scarran who boards Talyn and tries to take command.
An accident puts Crichton in a coma, where he uses his imagination to fight for his life. D'Argo tries to stop an alien ship from self-destructing, and taking Moya with it.
Aeryn tries to contact her deceased father on a planet fraught with mystics and frauds, but encounters an all-too familiar face. Crais is forced to make a shocking confession.
Moya's crew is reunited, and encounters another group of escaped Peacekeeper prisoners: a Nebari, a Scarran and a female Hynerian.
Rygel and D'Argo negotiate with Scorpius on Crichton's behalf. Talyn's hostile actions lead the crew to a difficult decision about his future.
Crichton and the crew board Scorpius' command carrier, launching a secret plot to sabotage his wormhole research. But a Peacekeeper commandant works to destroy their alliance and sign a peace treaty with the Scarrans.
Crichton is forced to go to extreme measures to destroy the Peacekeepers' wormhole research, and is betrayed to Scorpius. Two comrads must make the ultimate sacrifice.
The crew encounters a hostile Leviathan while trying to lay their friend to rest. Crichton and Aeryn must decide the fate of their love as the rest of the crew prepares to go their separate ways.
Crichton is reunited with Chiana and Rygel in an attempt to save a dying Leviathan from a group of mercenaries, who storm his new home in an attempt to harvest the living ship's flesh.
More of Moya's crew is reunited on a planet where Interion scientists are conducting an archeological dig. But their happy reunion is threatened when Commandant Grayza arrives and puts Crichton under a sensual spell.
The crew must stop the Peacekeepers from uncovering an alien weapon of mass destruction, while Crichton fights against Grayza's intoxicating allure.
The crew searches for Moya, but an emergency landing strands them on a desolate planet, where a group of mercenaries capture Rygel inside a lava-filled cavern.
The crew returns to Moya, where they find that Aeryn has returned -- struck with heat delirium. And when a massive alien vessel comes looking for her, Crichton and the others must outwit their opponent to save her life.
Moya is attacked by a large, space-faring organism that attaches to the hull and penetrates her systems.
John and Chiana are trapped in a virtual reality simulation, and must win a game controlled by an unstable Stark while Moya may be in danger of attack from within.
A gang of ruthless bounty hunters seize control of Moya in order to capture Crichton, and shrink the crew to keep them prisoner.
The crew seeks assistance on a world ruled by warring clans working toward a tenuous peace, but Aeryn is accused of assassinating their next leader.
An alien doctor blackmails Moya's crew by poisoning them with deadly mollusks.
Crichton falls into a wormhole and is found by an interdimensional being, who must decide whether or not to execute him because of the threat that his knowledge of wormholes presents to the universe.
Crichton returns to Earth, only to discover that he is more than 15 years in the past and his father has accepted command of the doomed Challenger mission.
Crichton makes his grand return home, where he and his alien friends introduce Earth to the larger universe that awaits them. Meanwhile, Grayza dispatches an alien chameleon to hunt Crichton
Chiana purchases a slave girl from a passing trading ship, but the crew quickly learns that Talikaa may not be as innocent as she seemed.
Scorpius takes Crichton, D'Argo and Rygel into an advanced training camp where students learn mental discipline. D'Argo is confronted with the arrival of Macton (the peacekeeper that murdered D'Argo's wife and framed him for her death).
While purchasing a camouflage device for Moya Aeryn and Sikozu witness the nearby landing of a Peacekeeper squad led by Grayza and Braca. Chiana and Noranti choose to undergo genetic manipulation to elude the shearching the Peacekeepers. Aeryn and Sikozu spy on Grayza who has convened a secret meeting with Scarran emissaries.
Having overheard Ahkna (the Scarran Minister of War) mention the secret Scarran base known as Katratzi sikozu is sure this is where the Sarran intend to take Aeryn. Though Moya's data banks have no record of Katratzi, Crichton is sure hehas heard the word Katratzi somewhere before.
Aeryn is being held captive aboard a Scarran feighter captained by Jenek who is determined to find out if Aeryn's carrying Crichton's child. To discover the location of the Scarran base where Aerin is being taken, Crichton and Scorpius travel through a wormhole to an "unrealized reality".
Moya's crew tracks Aeryn to a Scarran Border Station where the freighter she is imprisioned upon is about to leave for Katratzi. To keep the ship docked and under quarrantine Noranti gives Rygel s deadly and contagious disease. Though this gives them time to come up with a plan to rescue Aeryn they don't figure on the cunning and ruthlessness of Aeryn's Scarran captor: Jenek.
The crew travels to Katratzito save Scorpius that is being tortured for the wormehole information. The base is the home to the Halish and Charrid forces (underlings the Scarrans). The crew plans to incite a confrontation beteween the Halish and Charrid hoping to distract the Scarrans so that they can save Scorpius and prevent the Wormehole knowledge to fall into Scarran hands.
After thwarting Crichton's escape plan Scorpius denies that he is a Scarran spy and demands Crichton's help to destroy a cavern of vital Scarran flora. Scorpius clams that destroying the flora will provide them with a better means of escape. Meanwhile Rygel and Noranti fight an evil Stark.
Now safely back on Moya, Crichton learns that the Scarrans are planning to attack Earth. He feverishly analyzes his wormhole data and comes up with a way to collapse the wormhole to Earth but he can't do it alone. Meanwhile, Braca demands Scorpius to be released from Moya and returned safely to his Command Carrier.