Slim and Tubby are American cops in London to study police tactics. They wind up in jail and are bailed out by Dr. Jekyll. Jekyll has been murdering fellow doctors who laugh at his experiments. He has more murders in mind. At one point the serum that turns Jekyll into the murderous Hyde gets injected into Tubby.

Starring:

Al Ferguson, Anthony Marsh, Arthur Gould-Porter, Bert LeBaron, Betty Fairfax, Boris Karloff, Bud Abbott, Carmen De Lavallade, Clive Morgan, Clyde Cook, Craig Stevens, David Sharpe, Donald Kerr, Duke Johnson, Gil Perkins, Harry Cording, Harry Wilson, Helen Westcott, Henry Corden, Herbert Deans, Hilda Plowright, Isabelle Dwan, Jimmy Aubrey, John Daheim, J

Genre:

Comedy, Horror, Mystery, Sci-Fi