Harold Lloyd
Dr. 'Jack' Jackson

Mildred Davis
The Sick-Little-Well-Girl

John T. Prince
Charles F. Haskell - Her Father

Eric Mayne
Dr. Ludwig von Saulsbourg

C. Norman Hammond
Jamison - the Lawyer

Jackie Condon
Boy's Pal (uncredited)

Mickey Daniels
Boy Patient (uncredited)

Richard Daniels
Man (uncredited)

William Gillespie
Card Player (uncredited)

Wally Howe
Asylum Guard (uncredited)

James T. Kelley
Card-Playing Father (uncredited)

'Auntie' Mackay
Undetermined Secondary Role (uncredited)

Florence Mayon
Card Player's Daughter (uncredited)

Oscar Morgan
Undetermined Secondary Role (uncredited)

Charles Stevenson
Asylum Guard (uncredited)

Anna Townsend
Jamison's Mother (uncredited)

Dorothy Vernon
Restaurant Hostess (uncredited)

Joy Winthrop
Undetermined Secondary Role (uncredited)