Robert Conrad

Character: Eddie

Carol Lynley

Character: Sister Meredith

Lee Majors

Character: Larry

Lois Nettleton

Character: Sister Ellen

Jane Wyatt

Character: Sister Frances

Kevin Hagen

Character: Lieutenant Papich

Tod Andrews

Character: Wedemeyer

Gregory Sierra

Character: Police Sergeant

Ann Doran

Character: Sister Nadine

Barbara Barnett

Character: Louise

Byron Clark

Character: Chief Guard