Samantha Carter becomes the host of a Goa'uld when she was trying to save the life of the previous host.

Teal'c's son Rya'c is kidnapped by Apophis and SG1 tries to rescue him. When Rya'c is recovered he denounces his father and helps to capture the team. They escape, but will they be able to return to Earth and cure Rya'c?

While exploring a new planet, Teal'c is stung by a giant insect whose venom causes a terrifying transformation.

SG-1 travels to a planet whose people are allies of the Asgard.

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

Daniel falls victim to an invention that swaps his body with that of a dying man.

While testing new technology, a UAV malfunctions and crashes on a planet. SG-1 goes to determine the cause of the malfunction, but discovers that their presence may be causing serious injury to the planet's primitive inhabitants.

A solar flare sends SG-1 back in time thirty years to 1969. Captured by military police at Cheyenne Mountain, they escape with the help of a young Hammond and then must find the Stargate so they can return to the present.