A military unit uses an ancient archway to travel the universe and battle alien parasites in this cult sci-fi adventure based on the 1994 film `Stargate.' Curmudgeonly Col. Jack O'Neill teams with an archaeologist, an astrophysicist and an alien to combat the Gou'ald, a serpentine species that requires humanoid hosts. The series began on Showtime in July of 1997 (reruns aired in syndication in 1998), and then moved to the Sci-Fi Channel in 2002.