Alex Zahara takes on the role of Warrick, who was played by Dion Johnstone in "Forsaken." This marks Zahara's sixth different character that he has played on Stargate, usually under make-up. It's also the second week in a row that someone else has taken over a role originally played by Dion Johnstone. G. Patrick Currie, who plays Eamon in this episode, took over Johnstone's role as Chaka in the previous week's "Enemy Mine." Presumably Johnstone is off filming somewhere and was unavailable.