Cast & crew
Dr. Jack (1922)
Directed by Sam Taylor, Fred C. Newmeyer Written by Thomas J. Crizer, Sam Taylor, Hal Roach, Jean C. Havez
Cast
| Harold Lloyd | Jackson |
| Mildred Davis | The Woman |
| John T. Prince | Haskell |
| Eric Mayne | Ludwig |
| C. Norman Hammond | Lawyer |
| Jackie Condon | (uncredited) |
| Mickey Daniels | (uncredited) |
| Richard Daniels | (uncredited) |
| William Gillespie | (uncredited) |
| Wally Howe | (uncredited) |
| James T. Kelley | (uncredited) |
| 'Auntie' Mackay | Undetermined |
| Florence Mayon | (uncredited) |
| Oscar Morgan | Undetermined |
| Charles Stevenson | (uncredited) |
| Anna Townsend | (uncredited) |
| Dorothy Vernon | Restaurant |
| Joy Winthrop | Undetermined |
Crew
| Sam Taylor | Director |
| H.M. Walker | Title Designer |
| Fred C. Newmeyer | Director |
| Thomas J. Crizer | Writer |
| Walter Lundin | Director of Photography |
| Robert A. Golden | Assistant Director |
| Hal Roach | Producer |
| Sam Taylor | Story |
| Hal Roach | Story |
| Jean C. Havez | Story |
| Thomas J. Crizer | Editor |