Role
| Jerry Lewis | “Bugs” Peyton |
| Jerry Lewis | James Peyton |
| Jerry Lewis | Julius Peyton |
| Jerry Lewis | Captain Eddie Peyton |
| Jerry Lewis | Williard Woodward |
| Jerry Lewis | Skylock Peyton |
| Jerry Lewis | Everett Peyton |
| Jerry Lewis | Dr Matson |
| Sebastian Cabot | Dr Matson |
| Donna Butterworth | Donna Peyton |
| Gene Baylos | Circus Clown |