The Gorilla Man

The Gorilla Man is a 1943 American drama film directed by D. Ross Lederman. Despite the title and marketing, it is not a horror film, but a World War II espionage thriller.
Plot.
Military officer Captain Craig Killian is wounded in the line of duty and taken to a private hospital in England. Killian soon learns the hospital is a front of Nazi operations that wish to damage English home defense efforts.