Abbott and Costello Meet Dr. Jekyll and Mr. Hyde

Bud Abbott and Lou Costello, as two American police officers in Victorian London, team up with Boris Karloff's Dr. Jekyll to catch a monstrous killer. After a series of horrific murders, the duo, with the help of reporter Bruce Adams and young suffragette Vicky Edwards, must navigate the complexities of Dr. Jekyll's double life and stop the monster responsible. Along the way, Tubby becomes a literal mouse, and the police inspector is transformed into a monster.