Boris Karloff

Gruesome

Ralph Byrd

Dick Tracy

Anne Gwynne

Tess Trueheart

Edward Ashley-Cooper

Dr. L. E. Thal

June Clayworth

Dr. I.M. Learned

Lyle Latell

Pat Patton

Tony Barrett

"Melody" Fiske

Skelton Knaggs

X-Ray

James Nolan

Dan Sterne

Joseph Crehan

Chief Brandon

Milton Parsons

Dr. A. Tomic

Lex Barker

City Hospital Driver (uncredited)

Lee Phelps

Detective in Car (uncredited)

Sean McClory

Officer Carney (uncredited)

Harry Harvey

Humphrey

Harry Strang

Tim

William Gould

"Pop"

John Rawlins

Réalisateur

Herman Schlom

Producteur

Robertson White

Scénariste

Eric Taylor

Scénariste