Leonardo da Vinci (the Little Man) plans to paint the Mona Lisa with a frown, but The Pink Panther insists on a smile, which he paints on the Mona Lisa soon after Da Vinci paints her frown.
| Writing | John W. Dunn | Writer |
| Directing | Robert McKimson | Director |
| Production | David H. DePatie | Producer |
| Production | Friz Freleng | Producer |
| Sound | Henry Mancini | Theme Song Performance |
| Sound | Walter Greene | Music |
| Editing | Rick Steward | Editor |
| Production | Lee Gunther | Production Manager |
| Camera | John Burton Jr. | Camera Operator |
| Art | Richard H. Thomas | Background Designer |
| Visual Effects | Nelson Shin | Animation |
| Visual Effects | Virgil Ross | Animation |
| Visual Effects | Bob Bemiller | Animation |
| Visual Effects | Warren Batchelder | Animation |
| Visual Effects | Bob Richardson | Animation |
| Visual Effects | Dick Ung | Layout Supervisor |