From March 29, 1951, Lee Bowman plays the title character in this episode of The Adventures of Ellery Queen. During a high profile murder trial, Ellery proved the defendant could not have committed the crime, leaving prosecutor Charles Boone (John Newland, director/host of television's One Step Beyond) humiliated. Shortly after the trial Boone resigned. Determined to get even with Ellery, Boone plots "the perfect crime." Florenz Ames (Mr. Dithers on television's Blondie) co-stars as Ellery's father, Inspector Richard Queen.