The fourth season of Stargate SG-1, an American-Canadian television series, began airing on June 30, 2000 on Showtime.

The fourth season concluded after 22 episodes on February 14, 2001 on British Sky One, which overtook Showtime in mid-season.

Season four regular cast members include Richard Dean Anderson, Michael Shanks, Amanda Tapping, with Christopher Judge, and Don S. Davis.

In the scene in "Divide and Conquer" that flashes back to the events in Upgrades, where Carter and O'Neill are trapped on opposite sides of the forcefield, lines were written but the actors chose not to say them.

As Lecter does with Clarice in the movie, Harry Maybourne refers to quid pro quo, should O'Neill really want to get help from him.