Madhouse (1974)
Vincent Price plays Paul Toombes a horror actor famous for playing the character Dr. Death with Peter Cushing playing the writer of the Dr. Death film series. During a New Years Eve party Toombes' fiancee is killed. He wakes up to find her decapitated and the shock drives him to be institutionalized. Years later he decides to revive the character for a TV series and people start to die in ways similar to his films.
Far from either Cushing or Price's best film both horror icons are in good form here and there's plenty of disturbing imagery. There's also brief cameos from Basil Rathbone and Boris Karloff as shown in clips from other movies. While it's not a must see film from any of those horror alums it does provide us with an interesting and exciting mystery that keeps us guessing 'who dun it'.