The Secret of the Whistler

Ralph Harrison

Richard Dix

Kay Morrell

Leslie Brooks

Jim Calhoun

Michael Duane

Edith Marie Harrison

Mary Currier

Linda Vail

Mona Barrie

Joseph Aloysius 'Joe' Conroy

Ray Walker

Laura - Harrison's Servant

Claire Du Brey

McLaren aka Mac (uncredited)

John Hamilton

Jorgensen (uncredited)

Byron Foulger

Ernie Adams

Arthur Space

Fred 'Snowflake' Toones

Charles Trowbridge

Barbara Wooddell