Neil Simon wrote this spoof of murder mysteries in which famous detectives are challenged to solve a crime that has yet to be committed. Sam Diamond: Peter Falk. Tess Skeffington: Eileen Brennan. Dick Charleston: David Niven. Dora Charleston: Maggie Smith. Sidney Wang: Peter Sellers. Jessica Marbles: Elsa Lanchester. Milo Perrier: James Coco. Robert Moore directed.