Lisa Maris Meredith Phillips Actor Alex McArthur Josh Butler Actor Michael Shanks Melburn Ross Actor Camille Mitchell Mother Actor Dylan Walsh Sgt. Eldritch Actor William Atherton Franklin Murdoch Actor Jay Brazeau Bernard Katz Actor Bob Gunton Clute Nichols Actor Jim Byrnes Gary Latimer Actor Louis Del Grande Detective Renfro Actor Lorena Gale Doctor Actor Nadia Capone Miranda Actor Jennifer Copping Corporal Harrier Guest Star Andrew McIlroy Hal Kaplan Guest Star Dana Pemberton Security Guard Guest Star Kevin Conway Control Voice Voice Doug Jones Elder Alien Guest Star Michael Todd Alien Guest Star Deshka Penoff Janice Guest Star Terri Lynn Ibisoglu Sarah Guest Star Pen Densham Executive Producer Richard B. Lewis Executive Producer John Watson Executive Producer Sam Egan Writer Brad Markowitz Writer Carleton Eastlake Writer Jonathan Glassner Executive Producer Chris Ruppenthal Writer James Crocker Writer Chris Dickie Writer Naren Shankar Writer Mario Azzopardi Director James Head Director Steve Anker Director Neill Fearnley Director Helen Shaver Director Ken Girotti Director Brad Turner Director Brad Wright Writer Allan Eastman Director