Dion Johnstone, the actor who plays Captain Warrick Trevor, is credited for nine appearances on Stargate SG-1 (1997), playing Captain Nelson in Rules of Engagement (1999); Na'onak in Jolinar's Memories (1999) and The Devil You Know (1999) [credit only]; Alien #2 in Foothold (1999); Chaka in The First Ones (2000) and Beast of Burden (2001); Lt. Tyler in The Fifth Man (2001); and Wodan in Metamorphosis (2003).