The Scarlet Clue

Sidney Toler

— Charlie Chan

Benson Fong

— Tommy Chan

Mantan Moreland

— Birmingham Brown, Chauffeur

Robert Homans

— Capt. Flynn

I. Stanford Jolley

— Rolf Brot, alias Ralph Brett

Virginia Brissac

— Mrs. Marsh

Jack Norton

— Willie Rand

Janet Shaw

— Gloria Bayne

Ben Carter

— Ben Carter

Victoria Faust

— Hulda Swenson / Janet Carter

Helen Deverell

— Diane Hall

Leonard Mudie

— Horace Karloss

Reid Kilpatrick

— Mr. Chester, program announcer

Emmett Vogan

— Mr. Hamilton

Crane Whitley

— Henchman Cooper

Kernan Cripps

— Detective (uncredited)

Charles Jordan

— Nelson (uncredited)

Kenner G. Kemp

— Police Radio Expert (uncredited)

Milton Kibbee

— Herbert Sinclair (uncredited)

Frank Mayo

— Det. Hodge (uncredited)

Tom Quinn

— Chemist (uncredited)

Charles Sherlock

— Sgt. McGraw (uncredited)

Charles Wagenheim

— Rausch (uncredited)