Stargate SG-1 - Season 5 (2001)

When SG-1 flees from an expedition with Col. O'Neill and some mysterious team member named, Tyler, whom no one else knows about, stranded, the fitness of the team is questioned.

When SG-1 inadvertently dooms a planet upon arrival, the team must overcome Asgardian diplomacy and indigenous religious prejudice to put things right.

When Cassandra collapses at home, she is taken to the SGC for treatment. A retrovirus is causing her to emit an EM field and she expresses a need to return to her planet for an initiation ritual. SG-1 investigates and finds a Goa'uld laboratory, probably having belonged to Nirrti, meant for experimentation on the planet's population. They find that the ritual is part of the experiment, a time when Nirrti studies her subjects and cures them when she is done. SG-1 has found a way to cure Cassandra, but now all that remains to be found is Nirrti.

When Daniel's Unas friend, Chaka, is captured by another world's slavers, SG-1 goes to that world to rescue him.

SG-1 teams up with a Russian task force to investigate the disappearance of a Russian SG team on P2X-338. They discover that the Russian SG team released a creature that killed Marduk, a Goa'uld, in his sarcophagus. SG-1 must trust their Russian partners in order to escape the ziggurat alive.

With the death of Omac, the subsequent sudden Tollan reconsideration of their tech embargo leads to SG-1 suspecting a government conspiracy.

SG-1 makes contact with the Aschen, unaware of that their homeworld is one they were warned previously from the future to be considered off-limits.

Carter gets kidnapped and taken to an abandoned hospital where two doctors work to study the remains of Jolinar. She finds out that they have a Goa'uld, taken from the Russians, which they are planning to put it inside a man named Adrian Conrad to heal his sickness. They need Carter to tell them how to get the Goa'uld out after he's healed. O'Neill believes the government is involved with Carter's disappearance and contacts Maybourne. Together, with Daniel and Teal'c, they find Carter but also find out that the Goa'uld has escaped inside Conrad's body.

A strange ship is headed towards Earth, and the SGC suspects that Martin Lloyd and his companions may have something to do with it. O'Neill is sent to speak to Martin and is assigned as a military consultant on Martin's new show, "Wormhole X-treme!", which uncannily resembles SG-1 despite Martin once again losing his memory. His former shipmates stall Carter and Daniel by throwing them off the trail and into the hands of the NID.

While SG-1 is conducting training exercises for new recruits, Jack gets a call about a "foothold" situation. Wounded by compromised officers, O'Neill must lead the recruits in retaking the SGC.

When Teal'c is trapped in the Stargate buffer, the team must juggle the technical challenges along with personal, interdepartmental and diplomatic rivalries to rescue him in time.

In a Tok'ra plan to wipe out the Goa'uld, Daniel goes undercover as Yu's servant to release a poison at a meeting of the system lords. Meanwhile a Goa'uld attack on the Tok'ra base leaves the rest of SG-1 with their hands full.

As the Goa'uld summit continues, Daniel finds himself face to face with Osiris. He fools him in the same fashion as he did with Yu, but cannot bring himself to cause the death of Sarah, Osiris's host. He remains to uncover information about the unknown master of Osiris. Lantash, having taken Lt. Elliot as a host, guides the rest of SG-1 in escaping the fallen Tok'ra base.

A large asteroid is discovered on a collision course with Earth.

A new leader has risen among the Free Jaffa, K'tano, former First Prime of Imhotep. SG-1, accompanied by Bra'tac, seeks an alliance between the Tau'ri and the large force he has amassed.

On an alien planet, SG-1 discovers an inactive android is the only survivor of the destruction of her civilization. They bring her back to the SGC for study and manage to reactivate her. Things take a turn for the worse when she "makes" a replicator bug for Daniel.

To fix a mistake caused by the fake SG team, the real SG-1 must enlist the help of two convicts. The threat of an approaching Goa'uld mothership stresses the repair of the Sentinel.

As Jackson suffers from a fatal dose of radiation, he struggles with the value of his life while his friends deal with the emotional and diplomatic repercussions.

While still dealing with the loss of Daniel Jackson the SGC is contacted by the Asgard who require assistance dealing with Anubis, who seems to have new shield technology that can repel Asgard weapons.