Regie: Charles Lamont
In London treffen die Cops Slim und Tubby auf Dr. Jekyll, der eine Droge entwickelt hat, die ihn in das mordende Ungeheuer Mr. Hyde verwandelt. Als die beiden seinem Geheimnis auf die Schliche kommen, erwischt ausgerechnet Tubby das Mr. Hyde-Serum.
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)
Patti McKaye
Can-can dancer
Betty Tyler
Can-can dancer
Lucille Lamarr
Can-can dancer
Dante De Paolo
Specialty dancer
Carmen De Lavallade
Javanese dancer
Maisay Kawasuma
Javanese dancer
Henry Coden
Javanese actor
Marjorie Bennett
Militant woman
Isabelle Dwan
Mrs. Penprase
James Fairfax
Mr. Penprase
Harry Wilson
Man Asking for Match
Harry Cording
Rough Character in the Park
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)
Patti McKaye
Can-can dancer
Betty Tyler
Can-can dancer
Lucille Lamarr
Can-can dancer
Dante De Paolo
Specialty dancer
Carmen De Lavallade
Javanese dancer
Maisay Kawasuma
Javanese dancer
Henry Coden
Javanese actor
Marjorie Bennett
Militant woman
Isabelle Dwan
Mrs. Penprase
James Fairfax
Mr. Penprase
Harry Wilson
Man Asking for Match
Harry Cording
Rough Character in the Park
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)
Patti McKaye
Can-can dancer
Betty Tyler
Can-can dancer
Lucille Lamarr
Can-can dancer
Dante De Paolo
Specialty dancer
Carmen De Lavallade
Javanese dancer
Maisay Kawasuma
Javanese dancer
Henry Coden
Javanese actor
Marjorie Bennett
Militant woman
Isabelle Dwan
Mrs. Penprase
James Fairfax
Mr. Penprase
Harry Wilson
Man Asking for Match
Harry Cording
Rough Character in the Park