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 Damon Johnson as Peterson Peter Grier as Hays Nahanni Arntzen as Dumais Michelle Addison as Johnson Allison Graham as Lt. Crown Dane MacFahden as Wagner