Victor Garber
Victor was Ambassador Ovirda in the Stargate Universe episode “Seizure” as well as starring as Jack Bristow in Alias and the recent series Deception, ReGenesis, Eli Stone, The Flash and Legends of Tomorrow. He also starred in the web series Web Therapy and has graced Eli Stone, Sleepy Hollow and The Good Wife. IMDB
Alvin Sanders
Alvin played Fred in the Stargate SG1 episode “Holiday”, he has guest starred on Fringe, Tooth Fairy, Smallville, MacGyver, Riverdale and Second Chance.
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Ken Kabatoff
Ken was the office production assistant for Stargate Universe during its second season, he has also worked on Falling Skies, Reaper, Proof and Supernatural. He is currently a story editor on Travelers. IMDB Twitter