The Chinese Ring

Charlie Chan:
[about Davidson] Chinese chimpanzee not interfere with monkey business of big baboon. Not yet.

Charlie Chan:
Politeness golden key to many doors.

Armstrong:
I hope you're successful solving this case.

Charlie Chan:
Well, thank you so much, Mr. Armstrong. Well, you know, sometimes think successful detective one upon whom luck shines smiling coutenance.

Charlie Chan:
You know, Confuciussay good luck chain of foolish accidents.

Charlie Chan:
[to gatekeeper] How loud it thunder; how little it rain.

Charlie Chan:
Man who ride on tiger cannot dismount.

Birmingham Brown:
He can't?

Police Sgt. Bill Davidson:
Listen, Peggy, you holdin' out on me? You know something I don't know?

Peggy Cartwright:
That wouldn't take much brains

Charlie Chan:
[Last lines] Man who ride on merry-go-round all the time sooner or later catch brass ring.