Stargate Command opens a wormhole to a planet with a black hole in orbit.

O'Neill, Carter and Jackson are trapped on Hathor's planet. Teal'c and Hammond go to Chulak to forge a rescue plan and recover the team.

An alien incursion takes control of the base.

Ready to go on vacation, O'Neill is beamed away by the Asgard. Thor tells him that Earth is faced with an enemy even worse than the Goa'uld.

SG-1 has to deal with a Replicator infestation on a Russian sub on Earth while Major Carter advises the Asgard about combating the menace in their galaxy.

While testing a new spacefighter made from Goa'uld parts, Col. O'Neill and Teal'c are trapped when a hidden automatic recall function takes over and sends it into space.

When a "chosen" boy found on planet Abydos is brought to SGC, he sends a telepathic message, causing Daniel Jackson's personality to undergo disturbing changes. Will the rest of SG-1 be able to solve the mystery of the boy's origin before he becomes a power-hungry warmonger?

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.

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

When SGC detects an Goa'uld ship in orbit, SG-1 is dispatched with Jacob Carter to investigate. They find the ship to be abandoned with no discernible life signs and Sam determines it to be the same used to kidnap Thor. Once on board the Goa'uld vessel, they find that the crew had initiated a self destruct sequence. O'Neill would very much like to salvage the ship despite Jacob's warnings that it could be a Trojan horse. An examination of the computer core reveals that Thor may have been able to introduce a virus but Jacob was right: it's an ambush and the ship soon plunges in the ocean. SGC and the Navy mount a rescue operation.

A television news crew has unearthed information about an Air Force project called "Prometheus". They believe it to be a generator, but know it uses Trinium, an element not found on Earth. In order to keep them quiet the Air Force allows them to film the X-303, a spaceship based on Asgard technologies, otherwise known as Prometheus. Things turn south when the news crew arm themselves and hold the Prometheus, as well as Sam and Jonas, hostage.

Senator Kinsey is shot in the chest at a public event, killing him just before his party's presidential nomination. Jack is arrested for the murder, and General Hammond assigns the rest of SG-1 to uncover the truth.

The US and Russia reveal Stargate Command and its operations to representatives of the other permanent members of the United Nations Security Council.

The newly inaugurated President of the United States is briefed by the Head of the Joint Chiefs of Staff on the Stargate program. Former Senator, now Vice President, Kinsey attempts to get his running mate to back his policies for the program, but the president decides to look into the situation himself. Kinsey gets Richard Woolsey to convince the president of his agenda.

As the new head of the SGC, General O'Neill is beginning to feel the weight of his load, and he starts to have second thoughts about the whole idea, questioning his own competency.

With the threats of both the Replicators and the Goa'uld greatly diminished and the sister ship to the Prometheus, the Daedalus, now under construction, SG-1 is anxious to get a ride on the new ship. However, the mood is somewhat darkened by a phone call informing Dr. Jackson of Catherine Langford's death. After the funeral, Catherine's niece gives Daniel "a few odds and ends" that her aunt wanted him to have. Upon delivery it is discovered that almost her entire collection was shipped to Daniel's lab. He finds in one of her books a possible location of a ZPM, but scans of the area showed that it was no longer there. Daniel proposes that they use the Ancient's time machine to take it from Ra at Giza in 3000 BC.

The US and Russia reveal Stargate Command and its operations to representatives of the other permanent members of the United Nations Security Council.

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.

Ready to go on vacation, O'Neill is beamed away by the Asgard. Thor tells him that Earth is faced with an enemy even worse than the Goa'uld.

While testing a new spacefighter made from Goa'uld parts, Col. O'Neill and Teal'c are trapped when a hidden automatic recall function takes over and sends it into space.

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