The fifth season of the military science fiction television series Stargate SG-1 commenced airing on Showtime in the United States on June 29, 2001, concluded on Sky1 in the United Kingdom on February 6, 2002, and contained 22 episodes. The fifth season introduces future main character from Jonas Quinn portrayed by Corin Nemec from 2002–2004. The fifth season is about the ongoing war with the Goa’uld Empire after the death of Apophis at the start of the season and the rise of a new System Lord named Anubis. SG-1, a military-science team, are set to explore the Milky Way Galaxy. The one-hour premiere “Enemies”, which debuted on June 29, 2001 on Showtime had the lowest syndication of the seasons episode, but overall got a high viewership level. This would be the last season to feature Apophis alive, but he would return in dreams and alternate realities and timelines. The series was developed by Brad Wright and Jonathan Glassner. Season five regular cast members include Richard Dean Anderson, Michael Shanks, Amanda Tapping, Christopher Judge, and Don S. Davis.