Basil Rathbone (Sherlock Holmes)
Cass Daley (Sadie)
Patric Knowles (Mac)
Martha O'Driscoll (Margie)
Leighton Noble (Johnny)
Thomas Gomez (Wagstaff)
Tony De Marco (Actor/Actress)
Paula Kelly (Vocalist, one of the Modernaires)
Ole Olsen (Himself)
Fiorello LaGuardia (Actor/Actress)
Chic Johnson (Himself)
Nigel Bruce (Orchestra)
Lon Chaney, Jr. (Actor/Actress)
Billy Gilbert (Stone)
Chester Clute (Fud)
Edgar Kennedy (Judge)
Franklin Pangborn (Hotel Clerk)
Shemp Howard (Munbo)
Sally de Marco (Actor/Actress)
Count Basie and His Orchestra (Actor/Actress)
Marion Hutton (Herself)
The Delta Rhythm Boys (Actor/Actress)
Allan Jones (Orchestra)
Leo Carrillo (Actor/Actress)
Andy Devine (Actor/Actress)
Robert Paige (Orchestra)
Alan Curtis (Orchestra)
Percy Kilbride (Col. Merriweather)
Hans Conried (Roco)
Richard Lane (Hanley)
Andrew Tombes (Gregory)