Warner Oland, Keye Luke, John McGuire, Shirley Deane, Francis Ford, J. Carrol Naish, Paul Stanton, Boothe Howard, Drue Leyton, Wade Boteler, Shia Jung, George Brasno, Olive Brasno, Maxine Reiner, Franklyn Farnum
While visiting the circus with his family, Charlie is recruited by the big top's co-owner to investigate threatening letters that he's received.
"Charlie Chan" (Warner Oland) is about to take his extended family to the circus when he is co-opted into an investigation into some threatening letters being received by the owner. Before he can get his feet under the desk, though, his client is bumped off and he must now find a murderer amongst the company (and their beasties). It's a better story, this one - plenty going on; some interesting ch...