"Unending" is the tenth season finale and series finale of the science fiction television series Stargate SG-1, and the show's 214th episode overall. Written and directed by Robert C. Cooper, the episode originally premiered in the United Kingdom on Sky One on March 13, 2007, and in the United States on June 22, 2007, on the Sci Fi Channel. The episode attracted approximately 2.2 million viewers on its American broadcast, a ratings success for the Sci Fi Channel.

The tenth and final season of Stargate SG-1, an American-Canadian television series, began airing on July 14, 2006 on Sci Fi Channel. It concluded after 20 episodes on March 13, 2007 on Sky 1, which overtook the Sci-Fi Channel in mid-season. The series was developed by Brad Wright and Jonathan Glassner. Brad Wright, Robert C. Cooper, Joseph Mallozzi, and Paul Mullie served as executive producers. Season ten regular cast members include Ben Browder, Amanda Tapping, Christopher Judge, Claudia Black, Beau Bridges, and Michael Shanks.