In this horror classic, a mysterious figure known as "Dr. Rx" begins murdering crooks who escaped prosecution thanks to legal loopholes. As a private investigator tries to discover the vigilante's identity, he uncovers a shocking plot to implant a gorilla's brain into a human body. Weird! Patric Knowles, Lionel Atwill, Anne Gwynne, and Shemp Howard star. 66 min. Standard; Soundtrack: English Dolby Digital mono; lobby cards; photo gallery; more.