Tags: Television Season.
Season four of Stargate Atlantis an American-Canadian television series began airing on September 28 2007 on the US-American Sci Fi Channel. The fourth season concluded after 20 episodes on March 7 2008 on Sci Fi. The series was developed by Brad Wright and Robert C. Cooper who also served as executive producers. Amanda Tapping (Col. Samantha Carter) joins the cast as a regular for 14 episodes Jewel Staite (Dr.