Peter played Otho in the Stargate Atlantis episode The Tower. He also starred as Galen on the scifi series Crusade and appeared on B5, Charmed and Fringe as well as having an extensive career on stage. He will be starring in the upcoming Dystopia. IMDB
Mark voiced RJ Harrison in the animated series Stargate Infinity. He has also been on Andromeda, Taken, The Tudors, V and plays Pastor Tom on Resurrection and has a large resume of voice work including Hot Wheels: Battle Force 5, Voltron Force and Gadget and the Gadgetinis. IMDB Twitter Behind The Voice Official
David was an Ancient on two episodes of Stargate Atlantis (Echoes and The Return Part 1), he has also guest starred on Arrow, Fringe, Continuum, Once Upon A Time and Supernatural.