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.
as Charlie Chan
as Lee Chan
as Hal Blake
as Louise Norman
as John Gaines
as Tom Holt
as Joe Kinney
as Dan Farrell
as Nellie Farrell
as Lt. Macy
as Su Toy
as Colonel Tim
as Lady Tiny
as Marie Norman
as Mike - Ticket Taker
