Redemption, Pt. 1
In this sixth season premiere Jonas (Corin Nemec) unable to return to Kelowna is eager to finish what the missing Dr. Jackson started. He and O'Neill (Richard Dean Anderson) are introduced to the X-302 the first human-built spacecraft capable of interstellar travel. Meanwhile the Stargate mysteriously malfunctions and Carter (Amanda Tapping) informs O'Neill that it could explode and destroy all life on Earth. Redemption Pt. 1 ends with the fate of Earth in SG-1's hands and no apparent way to avert the impending catastrophe.