cast
- Basil Rathbone
- Sherlock Holmes
- Cass Daley
- Sadie
- Patric Knowles
- Mac
- Martha O'Driscoll
- Margie
- Leighton Noble
- Johnny
- Thomas Gomez
- Wagstaff
- Percy Kilbride
- Col. Merriweather
- Hans Conried
- Roco
- Richard Lane
- Hanley
- Andrew Tombes
- Gregory
- Billy Gilbert
- Stone
- Chester Clute
- Fud
- Edgar Kennedy
- Judge
- Franklin Pangborn
- Hotel Clerk
- Shemp Howard
- Munbo
- Marion Hutton
- Herself
- Allan Jones
- Orchestra
- Robert Paige
- Orchestra
- Alan Curtis
- Orchestra
- Ole Olsen
- Himself
- Paula Kelly
- Vocalist, one of the Modernaires
- Chic Johnson
- Himself
- Nigel Bruce
- Orchestra
crew
- Edward F. Cline
- Director
- Erle C. Kenton
- Producer
- Frederic I. Rinaldo
- Screenwriter
- Robert Lees
- Screenwriter
- Charles Van Enger
- Cinematographer
- Charles Previn
- Musical Direction/Supervision
- George Hale
- Composer (Music Score), Choreography
- Arthur D. Hilton
- Editor
- John P. Fulton
- Special Effects
