Dr. Jack

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)