Frederick

Judge Prentiss

Dr. Gallen Altheim

Dr. Henry Bender

Dr. van Arken

Rankeillor

Duncan

Dr. Danson (uncredited)

Porter

Frank Smith

Storekeeper

Judge

Josiah Borden

Dr. Sherman - Graham's physician at inquest

Bullard

Minister

Museum Director Barton

Party Guest (uncredited)

Timothy Helgelander (uncredited)

Higgler

Dr. Galt (uncredited)

Professor O'Neill

Undertaker (uncredited)

Dr. Fawcette (uncredited)

George Rennit, private investigator

Mr. Briggs (uncredited)

Roger Bronson

Jan

Hastings' Butler (uncredited)

Herbert Carter

John Hayes