Gene Blakely

as Lucien Holt

as Merchant

as Mr. Books

as Charlie

as Dr. Ralph Tetzi

as Dr. Tetzi

as Dr. Seymour Shapiro

as Phil

as Goldberg

as Phil

as Cahill

as Dave

as Kemp

as Stanley Wilson

as Lt. Len Ross

as Grant

as Corp. Mack (uncredited)

as Harry

as Dr. Frank Bennett

as Frank Oxman

as Robert Deering