Released October 8, 1961
Mr. Sardonicus involves a man whose face is permanently set in a grotesque grin after attempting to rib his father’s grave. One of William Castle’s many gimmick films, audience members were given glow in the dark card to decide the titular character’s fate. A thumbs up was a vote for mercy, while a thumbs down meant no mercy. The projector operator was then supposed to count the thumbs and play the reel with the corresponding ending. Castle insists he filmed both endings, but as only one ending to the movie has been found it is doubtful the alternative ending existed at all and the voting system was just a way to make audiences believe the show was interactive.