The Scarlet Clue

Sidney Toler

as Charlie Chan

Benson Fong

as Tommy Chan

Mantan Moreland

as Birmingham Brown, Chauffeur

Robert Homans

as Capt. Flynn

I. Stanford Jolley

as Rolf Brot, alias Ralph Brett

Virginia Brissac

as Mrs. Marsh

Jack Norton

as Willie Rand

Janet Shaw

as Gloria Bayne

Ben Carter

as Ben Carter

Victoria Faust

as Hulda Swenson / Janet Carter

Helen Deverell

as Diane Hall

Leonard Mudie

as Horace Karloss

Reid Kilpatrick

as Mr. Chester, program announcer

Emmett Vogan

as Mr. Hamilton

Crane Whitley

as Henchman Cooper

Kernan Cripps

as Detective (uncredited)

Charles Jordan

as Nelson (uncredited)

Kenner G. Kemp

as Police Radio Expert (uncredited)

Milton Kibbee

as Herbert Sinclair (uncredited)

Frank Mayo

as Det. Hodge (uncredited)

Leonard Mudie

as Horace Karlos (uncredited)

Tom Quinn

as Chemist (uncredited)

Charles Sherlock

as Sgt. McGraw (uncredited)

Charles Wagenheim

as Rausch (uncredited)