The Arnold of Arnold, like the Harry of The Trouble With Harry, is stone cold dead from the outset of this film. That doesn't stop Arnold's mistress Stella Stevens from marrying the corpse so as to come into his millions. The trick is to hide the fact that Arnold is indeed stiff as a mackerel. To accomplish this, a series of murders is a necessity. Special guest victims include Stevens' wastrel brother Roddy McDowall, her dotty sister Elsa Lanchester, handyman Jamie Farr, as well as lawyers Farley Granger and Patric Knowles. Also on hand are such dependables as Victor Buono, Shani Wallis, John McGiver and Bernard Fox. The script is by TV-sitcom stalwarts Jameson Brewer and John Fenton Murray. As one-joke films go, Arnold is as good as any.