Dr. Jack

Country doctor Jack Jackson is called in to treat the Sick-Little-Well-Girl, who has been making Dr. Saulsbourg and his sanitarium very rich after years of unsuccessful treatment.

• Sam TaylorDirector
• Thomas J. CrizerWriter
• Fred C. NewmeyerDirector

• 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 (uncredited)
• Mickey DanielsBoy Patient (uncredited)
• Richard DanielsMan (uncredited)
• William GillespieCard Player (uncredited)
• Wally HoweAsylum Guard (uncredited)
• James T. KelleyCard-Playing Father (uncredited)
• 'Auntie' MackayUndetermined Secondary Role (uncredited)