Dr. Jack
- År: 1922
- Land: United States of America
- Sjanger: Comedy, Romance
- Ettromsleilighet: Hal Roach Studios
- Nøkkelord: rivalry, lawyer, doctor, poker game, invalid, escaped mental patient, fake illness
- Regissør: Sam Taylor, Fred C. Newmeyer
- Cast: Harold Lloyd, Mildred Davis, John T. Prince, Eric Mayne, C. Norman Hammond, Jackie Condon