The Gorilla (1939)
[Public Domain] https://www.youtube.com/watch?v=VK21yPb_T9E
When a wealthy man (Lionel Atwill) is threatened by a killer known as The Gorilla, he hires the Ritz Brothers to investigate. A real escaped gorilla shows up at the mansion just as the investigators arrive. Patsy Kelly portrays a newly hired maid who wants to quit because the butler, played by Bela Lugosi, scares her.
For some reason, I can really see Matthew and Ian tearing into this one.