The Scarlet Clue

Charlie Chan

Tommy Chan

Birmingham Brown, Chauffeur

Capt. Flynn

Rolf Brot, alias Ralph Brett

Mrs. Marsh

Willie Rand

Gloria Bayne

Ben Carter

Hulda Swenson / Janet Carter

Diane Hall

Horace Karloss

Mr. Chester, program announcer

Mr. Hamilton

Henchman Cooper

Detective (uncredited)

Nelson (uncredited)

Police Radio Expert (uncredited)

Herbert Sinclair (uncredited)

Det. Hodge (uncredited)

Horace Karlos (uncredited)

Chemist (uncredited)

Sgt. McGraw (uncredited)

Rausch (uncredited)