In this wacky comedy thriller, Tim Conway and Don Knotts play clumsy Scotland Yard detectives out to solve a double murder. Their investigation takes them to a creepy mansion inhabited by an heiress and her crew of zany characters, but the slapstick sleuths soon encounter strange happenings of the ghostly kind. Trisha Noble, Bernard Fox co-star. 92 min. Standard; Soundtrack: English Dolby Digital mono; audio commentary; photo gallery; theatrical trailer.