Directed by: Lang Elliott
Starring: Don Knotts, Tim Conway, Bernard Fox, Trisha Noble
Revealing mistake: When the private eyes enter the mausoleum it is well lit from the studio lights when it should be pitch black as they enter.
Revealing mistake: When the private eyes are outside on the grounds there is loud thunder and lightning but it never rains.
Continuity mistake: In the scene where the work crew is getting introduced (after the inspectors fall down the chimney) Hilda the maid already has Tim Conway's business card in her bosom before he gives it to her.
Inspector Winship: This isn't one of your better inventions. Who ever heard of a gun that went off every hour?
Dr. Tart: Might save your life someday.
Inspector Winship: Yeah, if you have to shoot someone every hour.