At the request of the CIA, British secret agent Lester follows the ominous scientist George King, who, after successfully sabotaging an American rocket launch, has announced to the world's powerful that he can disable any nuclear weapon...
| Actor | Role |
|---|---|
 Rod DanaLester | Lester |
 Alicia BrandetNot listed | Not listed |
 John StacyLester's Chief | Lester's Chief |
 José BódaloGeorge King | George King |
 María BadmajewNot listed | Not listed |
 Mónica RandallNot listed | Not listed |
| SSonja RomanoffNot listed | Not listed |
 Demofilo FidaniKing's Lawyer | King's Lawyer |
 Piero MorgiaNot listed | Not listed |
| FFrancesco TensiNot listed | Not listed |
| LLino RanieriNot listed | Not listed |
 Enrico ManeraNot listed | Not listed |
| FFrançoise FiorettiNot listed | Not listed |
 Giovanni Ivan ScratugliaNot listed | Not listed |
 Antonio CasaleNot listed | Not listed |
| MMaria Pia ZambelliNot listed | Not listed |
| FFrancisco CebriánNot listed | Not listed |
 Tom FelleghyBritish Counterspy Chief | British Counterspy Chief |
| MMoisés Augusto RochaNot listed | Not listed |
 Luciano RossiDr. Krauss | Dr. Krauss |