Keye Luke reportedly clashed with director Harry Lachman over the latter's treatment of the circus midgets in the movie.
Two actors who played Charlie Chan appear in this film, Warner Oland as Chan and J. Carrol Naish in a supporting role as Tom Holt.
Naish played Chan on Television in "The New Adventures of Charlie Chan" (1957-1958)
The action occurs mostly at the Kinney & Gaines Combined Circus.