THE APE (1940) Stars Boris Karloff. A misunderstood, good-hearted scientist wants to cure a young woman, but to do it, he must kill. A huge gorilla escapes from a circus and Karloff uses the news to his nefarious advantage.
THE TERROR (1963) Karloff in a Corman quickie that's really very good. The ghost of a dead woman romances a soldier. A young Jack Nicholson co-stars.
DOOMED TO DIE (1940) Boris Karloff as detective -- Mr. Wong. This film is also known under the title: THE MYSTERY OF WENTWORTH CASTLE. A great entry in the series.
THE FATAL HOUR (1940) Boris Karloff as Mr. Wong, detective. Smuggling and murder on the waterfront in San Francisco...and Wong's on the case!