The Unholy Night

For reasons known only to MGM, Boris Karloff, prominently featured in a key supporting role, is not credited on screen, but his name is more sensibly listed in ninth credited position in the Variety review of 16 October 1929. The likeliest explanation is that all the actors are billed according to their respective "groups," but since Karloff was not in any of them, he was simply overlooked when the credits were being prepared.

[preface] The amazing revelations pictured here are compiled from one the most sensational murder cases on police record. The rare psychosis of the crime and the method of its exposure are stranger than fiction.....because they are true!

This film was also released in a silent version.

Alternate-language version of Le spectre vert (1930)