Detective Halloran goes undercover as a patient in a hospital mental ward in an attempt to identify the murderer of patient who was a witness in a gang killing.

Cast: John McIntire, James Franciscus, Harry Bellaver, Suzanne Storrs, House Jameson, Earl Rowe, Robert Weil, Mark Allen, Donald Moffat, Janice Mars, Helm Lyon, Jeno Mate, Alison Marshall, Herbert B. Leonard