Boris Karloff

Character: Dr. Julian Blair

Richard Fiske

Character: Dr. Richard Sayles

Amanda Duff

Character: Anne Blair

Anne Revere

Character: Mrs. Walters

Dorothy Adams

Character: Mrs. Marcy

Walter Baldwin

Character: Seth Marcy

Kenneth MacDonald

Character: Sheriff Ed Willis

Shirley Warde

Character: Helen Blair

Cy Schindell

Character: Karl

Ernie Adams

Character: Elam

Lester Allen

Character: Dr. Van Den

Wheaton Chambers

Character: Dr. Sanders

Eddie Kane

Character: Professor Walt

Harrison Greene

Character: Mr. Booth

Erwin Kalser

Character: Professor Kent

John Tyrrell

Character: Postmaster