The Thirteenth Hour

The Thirteenth Hour is a 1927 American silent mystery film produced and distributed by Metro-Goldwyn-Mayer and directed by Chester M. Franklin. The film stars Lionel Barrymore in a role where, as noted criminologist Professor Leroy, he dons a weird series of disguises to hide a dark secret. This was the first film where Barrymore was cast opposite talented dogs, and the first where he was cast as a serial killer.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.