Guest Stars Donnelly Rhodes as Dr. Cottle Rekha Sharma as Tory Foster Kate Vernon as Ellen Tigh Matthew Bennett as Number Five Kerry Norton as Paramedic Layne Ishay Callum Keith Rennie as Number Two Dean Stockwell as Number One Mark Sheppard as Romo Lampkin Rick Worthy as Number Four Co Starring Nicki Clyne as Callandra "Cally" Henderson Leah Cairns as Lt. Margaret "Racetrack" Edmondson Bodie Olmos as Lt. Brenden "Hotdog" Constanza Brad Dryborough as Lt. Louis Hoshi Colin Lawrence as Ensign Hamish "Skulls" McCall Colin Corrigan as Marine Allan Nowart Lara Gilchrist as Paulla Schaffer Iliana Gomez-Martinez as Hera Agathon Leela Savasta as Tracey Anne Darcy Laurie as Dealino Tobias Mehler as Zak Adama Kevin McNulty as Frank Porthos Simone Bailly as Shona Richard Jollymore as Marine #1 Anthony St. John as Marine #2 Dan Payne as Sean Holly Eglington as Stripper