Silent Night, Bloody Night is a 1972 American slasher film directed by Theodore Gershuny and co-produced by Lloyd Kaufman. The film stars Patrick O'Neal and cult actress Mary Woronov in leading roles, with John Carradine in a supporting performance. The plot follows a series of murders that occur in a small New England town on Christmas Eve after a man inherits a family estate which was once an insane asylum. Although it is attributed to Zora Investments Associates in the credits, the film was never registered with the United States Copyright Office, and thus fell into the public domain.