The Navy expects a veteran to pay for the ship he commanded, as they have no record of its return.
| Actor | Role |
|---|---|
 Jerry LewisJohn Paul Steckler I / John Paul Steckler IV / John Paul Steckler VII | John Paul Steckler I / John Paul Steckler IV / John Paul Steckler VII |
 Dina MerrillEns. Rita J. Benson | Ens. Rita J. Benson |
 Diana SpencerPrudence Trabert Steckler | Prudence Trabert Steckler |
 Mickey ShaughnessyStan Wychinski | Stan Wychinski |
 Robert MiddletonVice Adm. Philo Tecumseh Bludde | Vice Adm. Philo Tecumseh Bludde |
 Gale GordonCongressman Mandeville | Congressman Mandeville |
 Mabel AlbertsonMrs. Trabert | Mrs. Trabert |
 Claude AkinsLt. Cmdr. Farber | Lt. Cmdr. Farber |
 Hugh SandersAdm. Rogers | Adm. Rogers |
 Richard ShannonCmdr. Cross | Cmdr. Cross |
| CChuck WassilCmdr. Craig | Cmdr. Craig |
 Burt MetcalfeLt. Bond | Lt. Bond |
 Pamela DuncanLt. Ward | Lt. Ward |
 Karl LukasDugan | Dugan |
| GGeorge SasakiAsian Crewman (uncredited) | Asian Crewman (uncredited) |
| MMartin SmithOfficer (uncredited) | Officer (uncredited) |