Zak Santiago Zak played Rogelio Duran in the Stargate SG1 episodes Evolution 1 & 2 and also Corporal Rivers in Stargate Universe. He has also guest starred on Fringe, Continuum, Defying Gravity, Psych, The True Heroines, Kingdom Hospital and Signed Sealed Delivered. IMDB Twitter Alisen Down Alisen played Doctor Brightman in both Stargate SG1 and [...]