Dr. Jack

Elenco

• 
  Harold LloydDr. 'Jack' Jackson
• 
  Mildred DavisThe Sick-Little-Well-Girl
• 
  John T. PrinceCharles F. Haskell - Her Father
• 
  Eric MayneDr. Ludwig von Saulsbourg
• 
  C. Norman HammondJamison - the Lawyer
• 
  Jackie CondonBoy's Pal (sem créditos)
• 
  Mickey DanielsBoy Patient (sem créditos)
• 
  Richard DanielsMan (sem créditos)
• 
  William GillespieCard Player (sem créditos)
• 
  Wally HoweAsylum Guard (sem créditos)
• James T. KelleyCard-Playing Father (sem créditos)
• 'Auntie' MackayUndetermined Secondary Role (sem créditos)
• Florence MayonCard Player's Daughter (sem créditos)
• Oscar MorganUndetermined Secondary Role (sem créditos)
• 
  Charles StevensonAsylum Guard (sem créditos)
• Anna TownsendJamison's Mother (sem créditos)
• 
  Dorothy VernonRestaurant Hostess (sem créditos)
• Joy WinthropUndetermined Secondary Role (sem créditos)

Equipe Técnica