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 slapsticksleuths soon encounter strange happenings of the ghostly kind. Trisha Noble, Bernard Fox co-star. 91 min. Widescreen (Enhanced); Soundtrack: English Dolby Digital stereo; Subtitles: English; audio commentary by Conway, others; photo gallery; theatrical trailer.