Lexa Doig
Lexa has had a successful career in and out of the scifi genre including starring as Romi in Andromeda and having recurring roles on Continuum, Arctic Air, Saving Hope, The 4400, V, Eureka and guest starred in a recurring role as Dr. Carolyn Lam on eleven episodes of Stargate SG1. She is of course married to Michael Shanks:) IMDB Twitter
Alan Scarfe
Alan was Chancellor Druhin in the Stargate Atlantis episode Poisoning The Well and starred as Dr. Bradley Talmadge on Seven Days, he has also been on Kingdom Hospital, Andromeda, Voyager, MacGyver, Due South and Babylon 5. IMDB
Jonathan Holmes
Jonathan played Dr. Bricksdale on the Stargate SG1 episode Endgame. He has also guest starred on Eureka, Rogue, Almost Human, Cold Squad and also voiced characters on animated shows. IMDB Behind The Voice