The fight between a lion and a tiger in a circus was arranged and filmed live without editing.
Milburn Stone, generally used by Universal as a supporting player, played the lead because his wiry frame and naturally curly hair matched the archival shots of Clyde Beatty used as Fred Mason, Stone's character.
John Carradine's first leading role on screen, filmed from December 10-31, 1942. Release took place July 2, 1943.
Clyde Beatty receives special thanks for, "His cooperation in staging the thrilling animal sequences in this film."