Ben Carter and Mantan Moreland were vaudeville comedy partners and their three scenes together are from their regular routine. They had done a similar routine in another Chan film, The Scarlet Clue (1945).
At one point the film's title was to have been "Charlie Chan in Alcatraz" - potentially misleading, as he never goes there in the finished print.
The 40th of 47 Charlie Chan films.
Final film of Ben Carter.