Spoof whodunnit featuring a host of stars playing variations on well-known fictional detectives. Reclusive millionaire Lionel Twain (Truman Capote) invites a selection of famous sleuths to his mansion and subjects them all to a number of perilous and puzzling scenarios. The guests include Chinese crimefighter Sidney Wang (Peter Sellers), hardboiled detective Sam Diamond (Peter Falk), high society sleuths Dick and Dora Charleston (David Niven and Maggie Smith), and for Agatha Christie fans, the Marple and Poirot clones Jessica Marbles (Elsa Lanchester) and Milo Perrier (James Coco). Written by Neil Simon.