The crew of an aircraft carrier discovers that it is being pursued by a UFO that turns out to be a radioactive probe from outer space. They appeal to the warring countries of Earth to stop fighting and help it to repel the invaders.
| Actor | Role |
|---|---|
| AAndré SmaggheGayac | Gayac |
 Jacques MonodCommandant Ravesne | Commandant Ravesne |
 Marcel BozzuffiMontfort | Montfort |
 Henri PiégayMajo | Majo |
 Bernard FressonLaurent | Laurent |
| CChristian Le GuillochetMansard | Mansard |
 Claude CarvinCarlier | Carlier |
 Guy TréjanLe ministre | Le ministre |
 Jean DastéBazin, le savant | Bazin, le savant |
 Yves BrainvilleBricourt | Bricourt |
| JJean-François ZellerL'aumônier | L'aumônier |
 Yvonne MonlaurFrançoise | Françoise |
| BBeatrice CenciL'amie de Majo | L'amie de Majo |
 Jacques SantiJolivet | Jolivet |
| GGuy HaureyNot listed | Not listed |
 Roger Van MullemL'amiral | L'amiral |
 François ValorbeNot listed | Not listed |
 Pierre ColletNot listed | Not listed |
 Yves ElliotNot listed | Not listed |
| VVladimir BelliniLe commandant du sous-marin | Le commandant du sous-marin |
| DDimitri DineffLe second du sous-marin | Le second du sous-marin |
| RRoger NicolskiNot listed | Not listed |