>> Enemies
Episode 501
After losing Teal'c to Apophis, SG-1 and Jacob prepare to battle against their foe on board Cronos's ship. A mysterious ship arrives which allows them to escape slightly damaged. Later the team discover the ship has no life except an army of replicator bugs.
>> Threshold
Episode 502
Teal'c has been saved from death, but mentally remains loyal to his old master, Apophis. Bra'tac suggests an ancient Jaffa ritual called M'al Sharran - a process which could either save or kill Teal'c.
>> Ascension
Episode 503
While investigating an alien device Carter is found unconscious. Resting from expected exhaustion, she is visited by an invisible being who holds vital clues to the device.
>> The Fifth Man
Episode 504
O'Neill stays behind on an alien world to tend the wounded Lt Tyler, the latest member of Sg-1. Back on Earth Hammond informs the team the Lt Tyler does not exist. Col Simmons sees this latest case of alien mind control as an excuse to close down the SGC.
>> Red Sky
Episode 505
SG-1 are welcomed on K'Tau by the planet's religious leader who takes the reddening sky concurrent with their arrival as a sign from their Gods. In reality it is a solar reaction caused by SG-1's wormhole which could be the death for the planet.
>> Rite of Passage
Episode 506
As teenager Cassandra enters puberty, an electomagnetic field is triggered within her. Sg-1 and her adoptive parent Dr Fraiser feel they may not be able to stop the changes caused by the legacy of the Goa'uld genetic experiment.
>> Beast of Burden
Episode 507
Daniel's Unas friend Chaka is captured by a pre-industrial civilisation that uses Unas as slaves. While attempting to free Chaka from this cruel regime, Daniel not only risks Sg-1's safety but also the stability of an age-old system..
>> The Tomb
Episode 508
On a rescue mission to recover Russian Soldiers missing-in-action on a previously undisclosed mission, Sg-1 get trapped in a Goa'uld tomb. Here they discover not only the remains of a russian soldier, but a killer alien from which they must now escape.
>> Between Two Fires
Episode 509
The Tollan face an enemy far worse than ever, even their powerful Ion cannons do not effect the approaching enemy ship.
>> 2001
Episode 510
O'Neill sent a note back informing the SGC to never visit the planet P4C-970 in 2020. They meet them via a different route in the year 2001 but do SG-1 guess that the Aschen and this race are one and the same.
>> Desperate Measures
Episode 511
A wealthy man who is critically ill funds a programme to a have a Goa'uld symbiote implanted in him to save his life. Carter is kidnapped (as she has been a carrier of a symbiot before) to assist in the procedure and Col Harry Mayborne may be the only man that can help find her.
>> Wormhole X-treme
Episode 512
In the spectacular 100th episode, Marty from Season 4's "Point of no return" is back on medication and has forgotton he is an alien. Believing himself to be a TV Producer he has an idea for a Stargate Show called "Wormhole X-Treme". SG-1 need Marty to help save his race but he doesn't remember who he is.
>> Proving Ground
Episode 513
At a Top Secret Training Facility young cadets are put through their paces by Jack O'Neill. One of these cadets is Lt Hailey. After a possible foothold situation at the SGC, O'Neill has no choice but to put his cadets to a very real and dangerous test trying to re-claim the SGC.
>> 48 Hours
Episode 514
After a near-deadly pursuit by gliders and the well aimed destruction of an alien vessel, the SG-1 team manage to safetly leap to safety through the Stargate, however, when Teal'c jumps through he becomes lost in the system.
>> Summit
Episode 515
A plan is being mounted which could thwart the ambitions of the Goa'uld once and for all. It could involve taking out their entire leadership and is an opportunity too good to be missed.
>> Last Stand
Episode 516
SG-1 face a critical situation with the arrival of Anubis, a powerful System Lord. Meanwhile Carter is trapped in a tunnel and only the application of crystals can cause the surrounding cave to dematerialise.
>> Fail Safe
Episode 517
SG-1 have to help stop an asteriod heading for Earth, but they soon discover a sinister reason for it's chosen target.
>> The Warrior
Episode 518
A charismatic Jaffa leader seeks to forge an alliance between Earth and his rebel followers, winning the allegiance of Teal'c and Bra'tac.
>> Menace
Episode 519
SG-1 encounters a young woman with the ability to control Replicators, and who may hold the key to the salvation of the Asgard.
>> The Sentinel
Episode 520
SG-1 must turn to a pair of convicted criminals to save a world from annihilation by the Goa'uld.
>> Meridian
Episode 521
Daniel Jackson is exposed to a lethal dose of radiation while visiting an alien civilisation that is building a weapon of mass destruction.
>> Revelations
Episode 522
SG-1 must come to the rescue of their once-powerful allies when the Goa'uld attack a secret Asgard laboratory.
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Episode Info from SG1.co.uk
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