401 - SMALL VICTORIES

Synopsis:
Major Carter goes to save an Asgard world from the Replicators. O'Neill and the SGC discover that Replicators from Thor's ship have survived and have taken over a Russian submarine.

Goa'uld Appearances:
None.

402 - THE OTHER SIDE

Synopsis:
SG-1 make contact with a race of humans who are forced underground during a horrible war. They desire to exchange technology, but all is not what it seems in this war.

Goa'uld Appearances:
None.

403 - UPGRADES

Synopsis:
A Tok'ra archeologist arrives at the SGC with a revolutionary technology and asks to test it on SG-1. With new super-human strenght, little can oppose them.

Goa'uld Appearances:
Apophis(mentioned).

404 - CROSSROADS

Synopsis:
Teal'c encounters his long lost lover who brings hope that the Goa'uld may be turned to the side of good. But is this hope simply and illusion?

Goa'uld Appearances:
Tanith.

405 - DIVIDE AND CONQUER

Synopsis:
Seemingly friendly personal start turning up as programmed killers, the Tok'ra and SG-1 must find who is responsible. Fingers begin to be pointed in the directions of Major Carter and Jack O'Neill, who can do little to defend themselves.

Goa'uld Appearances:
None specifically mentioned.

406 - WINDOW OF OPPORTUNITY

Synopsis:
A renegade scientist activates a device created by the Ancients that loops times continuously. It's up to Teal'c and O'Neill to use what they know to stop the time loop.

Goa'uld Appearances:
None.

407 - WATERGATE

Synopsis:
It's discovered the Russia has a stargate, but is unable to deactivate their gate that is locked on to a planet where that particular stargate is submerged under water.

Goa'uld Appearances:
None.

408 - THE FIRST ONES

Synopsis:
SG-1 encounter a planet populated by primitive Unas that may be in fact the primordial homeworld of the Goa'uld. Things get complicated when Daniel Jackson is kidnapped by an Unas.

Goa'uld Appearances:
None specifically mentioned.

409 - SCORCHED EARTH

Synopsis:
SG-1 must face of a powerful alien race that is bent on colonising planet with devastating means that could destroy another race that has recently colonised that planet.

Goa'uld Appearances:
None.

410 - BENEATH THE SURFACE

Synopsis:
SG-1 are forced to work inside an underground facility and appear to have no memory of their lives.

Goa'uld Appearances:
None.

411 - POINT OF NO RETURN

Synopsis:
A strange man claims to know about the stargate program. All is not what it seems when several individuals are seeking this very person.

Goa'uld Appearances:
None specifically mentioned.

412 - TANGENT

Synopsis:
While testing a new prototype fighter based on Goa'uld death gliders goes awry when O'Neill and Teal'c are propulsed into deep space with little hope of coming back to Earth.

Goa'uld Appearances:
Apophis(mentioned), Heru-ur(mentioned).

413 - THE CURSE

Synopsis:
Daniel's old teacher turns up dead and the prime suspect is one of his old associates. Things turn for worse when an ancient Goa'uld is revived.

Goa'uld Appearances:
Osiris, Isis(mentioned), Seth(mentioned), Sokar(mentioned), Ra(mentioned), Hathor(mentioned).

414 - SERPENT'S VENOM

Synopsis:
Apophis and Heru-ur attempt to form an alliance against the System Lords. SG-1 and Selmak must rush to sabotage the alliance would give them the power to take over the galaxy.

Goa'uld Appearances:
Apophis, Heru-ur.

415 - CHAIN REACTION

Synopsis:
Hammond retires and new commanding officer arrives and takes rather extreme action in his order. O'Neill and Maybourne must team up to uncover the conspiracy.

Goa'uld Appearances:
None specifically mentioned.

416 - 2010

Synopsis:
In the future, Carter discovers that Earth's new benevolent allies are in fact attempting to take over the planet. SG-1 must pull together and hatch a daring plan to send a message back time in order to prevent the fatal alliance.

Goa'uld Appearances:
None specifically mentioned.

417 - ABSOLUTE POWER

Synopsis:
Daniel comes into contact with the Harcesis child, Shifu, he give knowledge to Daniel who begins acting erracticly. He insists it's for the best interests of Earth, but a hidden motive begins to surface.

Goa'uld Appearances:
None specifically mentioned.

418 - THE LIGHT

Synopsis:
SG-1 explore and abandonned Goa'uld pleasure palace. The strange light emanating seems to keep team attracted to it. Even worse, it seems that they cannot leave the palace without eventually dying.

Goa'uld Appearances:
None specifically mentioned.

419 - PRODIGY

Synopsis:
A young cadet risks sacrificing a brilliant career in the Stargate Program and Major Carter attempts to bring her back on track. Meanwhile, SG-1 encounter a race of beings made purely of light.

Goa'uld Appearances:
None.

420 - ENTITY

Synopsis:
Carter is taken over by a technological being that controls the bases' computer systems. It's up to the rest of the team to find a way to free her from it's control.

Goa'uld Appearances:
None.

421 - DOUBLE JEOPARDY

Synopsis:
SG-1's robotic doubles visit a planet previously visited by the real SG-1 and find out that it has been conquered by Cronos. It's up to the real team to make it to the planet and free it from the powerful System Lord.

Goa'uld Appearances:
Cronos, Heru-ur(mentioned).

422 - EXODUS

Synopsis:
Tanith betrays the Tok'ra and encourages Apophis to attack their base on Vorash. SG-1 and Jacob use their stolen mothership to try and destroy Apophis' massive fleet.

Goa'uld Appearances:
Apophis, Tanith, Cronos(mentioned).