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
