First, "Stargate SG-1" was cancelled just after its 10th season and 200th episode in 2007, and then "Stargate Atlantis," its successful spin-off, got the axe in 2008.

News Stargate SG1, Atlantis come to iTunes By Peter Cohen Macworld AUG 20, 2006 5:00 pm PDT ...

Stargate Atlantis ran for five seasons on SYFY, itself a spinoff of SYFY’s long-running Stargate SG-1 series. If you’re looking for more space-set action, check out SYFY’s The Ark.