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.

Warner Oland
as Charlie Chan

Keye Luke
as Lee Chan

John McGuire
as Hal Blake

Shirley Deane
as Louise Norman

Francis Ford
as John Gaines

J. Carrol Naish
as Tom Holt

Paul Stanton
as Joe Kinney

Boothe Howard
as Dan Farrell

Drue Leyton
as Nellie Farrell

Wade Boteler
as Lt. Macy
CinemaSerf
"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 th...