04.01 Episode 67
Airdate: June 30, 2000

Thor's ship has been destroyed in an uncontrolled reentry through Earth's atmosphere, crashing into the Pacific Ocean, and taking the Replicators and the stargate with it. The beta stargate is established at the SGC, allowing SG-1 to return home, but they are met with disturbing news. At least one of the Replicators has survived, and has found its way to a Russian submarine, killing everyone on board, and replicating at an alarming rate. O'Neill suggests destroying the sub with nuclear weapons, but the Pentagon faces a delicate diplomatic situation with the Russians.

Hoping to avoid an international incident, O'Neill and Teal'c lead a small combat team to face the deadly bugs aboard the submarine and to eliminate the threat to Earth. Their conventional weapons have a limited effect against the enemy, especially against the original Replicator, which has mutated into an enormous and nearly indestructible "mother bug". Destruction of the submarine is the only solution, and O'Neill and Teal'c find themselves trapped aboard the sub as they plant the explosives and desperately try to find a means of escape before the sub is destroyed.

Meanwhile, the Asgard also face defeat by the Replicators in their home galaxy. Thor arrives at the SGC, hoping that the "less sophisticated" human approach may lead to the solution that eludes the Asgard. Carter's human knowledge provides a clever deception, using the Asgard's premiere ship, the "O'Neill", to lure the Replicators to their destruction. For now, both Earth and the Asgard are spared, but these are only small victories, and the Replicator threat remains.

Written by: Robert C. Cooper
Directed by: Martin Wood

Guest Starring: Colin Cunningham as Major Davis, Gary Jones as Technician, Teryl Rothery as Dr. Fraiser, Dan Shea as Sergeant Siler, Yurij Kis as Yuri, Dmitry Chepovetsky as Boris

Reference: Asgard, Asgard Mothership, Asgard Stones, Asgard Transport Beam, Beta Stargate, Paul Davis, Ida, IDC, The O'Neill, Replicators, Russians, Sergeant Siler, Thor, Weapons, Major Wood


Asgard Homeworld