The Case of the Black Cat is a 1936 American mystery film directed by William C. McGann and an uncredited Alan Crosland, based on the 1935 Perry Mason novel The Case of the Caretaker's Cat by Erle Stanley Gardner. The film stars Ricardo Cortez as Perry Mason and co-stars June Travis and Jane Bryan in her film debut. The film is the fifth Perry Mason adaptation distributed by Warner Bros. Pictures in the 1930s and the first in the series not to feature Warren William as Mason.

Plot

Mason is summoned to the Laxter mansion in the dead of night to write granddaughter Wilma out of invalid Peter Laxter's will, to keep her from marrying suspected fortune hunter Doug. Peter dies in a mysterious fire and Laxter's two grandsons, Sam Laxter and Frank Oafley, inherit his estate on the condition old caretaker Schuster and his cat Clinker are kept on. When cat-hating Sam threatens Clinker, Perry steps in and learns Laxter's death was suspicious and the family fortune and diamonds are missing.