The Drums of Jeopardy is a 1931 American Pre-Code horror film directed by George B. Seitz. It is the second film adaptation of Harold McGrath’s novel of the same name, and stars Warner Oland as Dr. Boris Karlov. The name of the villain in the novel was originally called Boris Karlov, but when the actor Boris Karloff rose to prominence circa 1923, the character’s name was changed to Gregor Karlov in the 1923 silent film adaptation to avoid confusion. It was changed back to Boris again in this 1931 remake of the film.

Plot
A mad scientist seeks revenge against those he holds responsible for his daughter’s death.

Cast
Warner Oland as Dr. Boris Karlov
June Collyer as Kitty Conover
Lloyd Hughes as Prince Nicholas Petroff
Clara Blandick as Abbie Krantz
Hale Hamilton as Martin Kent
Wallace MacDonald as Prince Gregor Petroff
George Fawcett as General Petroff
Florence Lake as Anya Karlov
Mischa Auer as Peter
Ernest Hilliard as Prince Ivan Petroff