As American policemen in London, Bud and Lou meet up with Dr. Jekyll and Mr. Hyde.
Bud Abbott
Slim
Lou Costello
Tubby
Boris Karloff
Dr. Henry Jekyll / Mr. Hyde
Craig Stevens
Bruce Adams
Helen Westcott
Vicky Edwards
Reginald Denny
Inspector
John Dierkes
Batley
Eddie Parker
Mr. Hyde (uncredited)
