
A team of explorers made up of soldiers and scientists travels through a Stargate, an ancient portal to other planets. They use the Stargate to explore new worlds, forge ties with friendly civilizations and protect Earth from hostile forces. The TV series is based on the theatrical film "Stargate."

O'Neill (Richard Dean Anderson) tries to track down Carter (Amanda Tapping), who is missing on Earth and endangered by deadly experiments.

In order to monitor the alien, O'Neill becomes technical adviser to a new TV series with a familiar storyline.

A mission at Stargate Command cuts short O'Neill's training session with a young Stargate team.

When Teal'c fails to materialize through the Stargate, the other SG-1 members race against time to save him.