Stargate SG-1: Every Season Ranked Worst To Best

The fifth season of Stargate SG-1 was the last one to feature the original cast line-up - while Daniel Jackson would return for Season 7, he moved in the cast order from second to last.

This season would begin with Jack, Sam, Daniel and Jacob Carter facing off against Apophis' mothership, with all of them stranded in the wrong galaxy. With Teal'c thought dead, things look dire until another ship intervenes and they encounter another of their enemies out here, the Replicators.

After surviving these trials, the team face a multitude of enigmas and threats across this season, from the insidious Aschen, to Unas slavers, to highly devious NID officers. But more than anything, the established order of things is shaken up with a gathering of the much-vaunted System Lords in a central two-part episode. As the System Lords gather, Daniel is in a position to hear of the emergence of their newest enemy, Anubis.

With only the name mentioned and numerous lesser Goa'uld already in service to him, Anubis sets out devastating the SGC's allies in a brutal campaign of destruction. The Tolan and the Tok'ra both suffer near obliteration and the fledgling Jaffa rebellion almost suffers the same fate. Despite being on the back foot for some of the season, there's still time to have some fun, especially in Wormhole X-Treme, the 100th episode of the show where many of the regular crew got to make on-screen appearances as fictional versions of themselves.

By the end of this season, Michael Shanks had decided that he now wanted to move on. While he would return, his final episode Meridian is a real tear-jerker.

Finally, the episode 48 Hours introduces a face that would become familiar as the franchise developed - a certain annoying scientist called McKay.