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Sticking in fans’ minds the way few sci-fi shows do, Stargate SG-1 ushered some of its stars through a big chunk of their acting careers, a feat that’s all but bound to happen when a series endures for 10 successful seasons.

Crossing over from theaters to television from director Roland Emmerich’s sci-fi classic 1994 feature film Stargate, series creators Brad Wright and Jonathan Glassner picked up the action right on the heels of the movie’s big ending, keeping key big-screen characters while switching out the actors who played them in a casting move that earned more and more believers as the show rolled along.

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Richard Dean Anderson took the baton from Kurt Russell to play the TV version of SG-1 commander Jack O’Neill (a last name that gained an extra “L” for television in the process), while James Spader’s movie role of Egyptologist Daniel Jackson went to Michael Shanks.

But the SG-1 cast also brought along newcomers (like Samantha Carter actor Amanda Tapping); additions who helped expand the