The Brain
Anna Holt
Dr. Peter Corrie
Stevenson
Dr. Frank Shears
Ella
Mr. Walters
Immerman
Martin Holt
Marion Fane
Furber
Dr. Miller
Thomas Gabler
Stevenson's secretary
Mrs. Gabler
Da Silva
Miss Soong
Inspector Pike
Young Woman at Dance Hall (uncredited)
Dance Hall MC (uncredited)
Frederick (uncredited)
