Boris Karloff

Dr. Henryk Savaard

Lorna Gray

Janet Savaard

Robert Wilcox

'Scoop' Foley

Roger Pryor

District Attorney Drake

Don Beddoe

Lieutenant Shane

Ann Doran

Betty Crawford

Joe De Stefani

Dr. Stoddard

Charles Trowbridge

Judge Bowman

Byron Foulger

Lang

Dick Curtis

Jury Foreman Clifford Kearney

James Craig

Juror Watkins

John Tyrrell

Juror Sutton

George Anderson

Prison Warden (uncredited)

Stanley Blystone

Prison Guard (uncredited)

Sam Ash

Druggist (uncredited)

Harlan Briggs

Defense Attorney Parker (uncredited)

Stanley Brown

Bob Roberts (uncredited)

Flo Campbell

Housewife (uncredited)

John Dilson

King - City Editor (uncredited)

Carl Faulkner

Bailiff (uncredited)

Chuck Hamilton

Juror (uncredited)

Frank Jaquet

Cigar-Smoking Fat Juror (uncredited)

Kenner G. Kemp

Reporter (uncredited)

William Lally

Bailiff (uncredited)

Perc Launders

Bailiff (uncredited)

Larry Lund

Court Clerk (uncredited)

Ian Maclaren

Priest (uncredited)

Charles McAvoy

Prison Official (uncredited)

Charles Miller

Dr. Avery - Juror (uncredited)

Bert Moorhouse

Reporter (uncredited)

Franklin Parker

Second Reporter (uncredited)

Tom Quinn

Reporter (uncredited)

Bob Reeves

Juror (uncredited)

Walter Sande

Reporter at Typewriter (uncredited)

Robert Sterling

First Reporter (uncredited)

Edward Thomas

Butler (uncredited)

Cyril Thornton

Senior Butler (uncredited)