Guest Stars Paul McGillion as Dr. Carson Beckett Robert Davi as Acastus Kolya Laura Mennell as Sanir Jana Mitsoula as Allina Co Starring David Nykl as Dr. Radek Zelenka Chuck Campbell as Chuck Dean Marshall as Sgt. Bates Boyan Vukelic as Sgt. Stackhouse Adrian Hough as Genii Lieutenant Grahame Andrews as Porta Simon Longmore as Tathal John Tierney as Astrum