Prof. Andrew Forbes (George Zucco) discovers a creature and uses it to destroy his enemies. George Zucco is best known film role of Professor Moriarty in The Adventures of Sherlock Holmes (1939), opposite Basil Rathbone as Sherlock Holmes.
Dr. Boris Karlov (yes Karlov), played by Warner Oland, is an evil scientist who decides to take revenge on people that he thinks are responsible for his families death.
Seaman Johnny Drake (Dennis Hopper) falls in love with Mora (Linda Lawson), who lives in a hotel above the marina merry-go-round (the movie was filmed at the Santa Monica pier)and is a mermaid for the carnival. All of her previous lovers have died, so Johnny gets a little concerned.
Svengali (1931) is a drama/horror film starring John Barrymore, Marian Marsh, and Bramwell Fletcher, directed by Archie Mayo, written by J. Grubb Alexander, and released by Warner Brothers. It is based on the gothic horror novel Trilby (1894) by George du Maurier. The film was originally released on May 22, 1931.