Mystery of the White Room

Bruce Cabot

Dr. Bob Clayton

Helen Mack

Carole Dale

Joan Woodbury

Lila Haines

Constance Worth

Ann Stokes

Thomas E. Jackson

Sergeant Macintosh Spencer (as Thomas Jackson)

Tom Dugan

Hank Manley

Mabel Todd

Dora Stanley

Roland Drew

Dr. Norman Kennedy

Addison Richards

Dr. Finley Morton

Frank Reicher

Dr. Amos Thornton

Frank Puglia

Tony

Don Porter

Dr. Donald Fox

Dee Dodd

Little Boy

Byron Foulger

The Coroner

John Harmon

Pete - the Fingerprint Man