Guest Stars Paul McGillion as Dr. Carson Beckett Craig Veroni as Dr. Peter Grodin Co Starring David Nykl as Dr. Radek Zelenka Dean Marshall as Sgt. Bates Lindsay Collins as Dr. Biro Peter Grier as Hays Damon Johnson as Peterson Nahanni Arntzen as Dumais Michelle Addison as Johnson Allison Graham as Lt. Crown Dane MacFahden as Wagner