While still playing Chester on the marathon TV Western Gunsmoke, Dennis Weaver found the time to accept an entirely different role in this Hitchcock episode. Weaver is cast as Charles Cavender, who has suffered from chronic insomnia ever since his wife was killed in a fire. Making matters worse, his late wife's brother Jack (Jack Ragin) holds Charles responsible for her death. Visiting a psychiatrist (James Millhollin), Charles is advised to resolve his guilt feeling with a heart-to-heart talk with Jack. Alas, the ensuing conversation proves to be one heart short -- resulting in murder. ~ Hal Erickson, Rovi