An electronic ray that can counter any aerial attacks has just been invented by Professor Goodwin, but before he can put in good hands, he is kidnapped by a criminal organization, that starts an international bid for him and his invention among the rogue countries of the world. The CIA sends Agent Sigma 3 to find the Professor before the transaction takes place. His mission takes him from Rome to Tangiers, and to Barcelona.
| Actor | Role |
|---|---|
 Jack TaylorCharles Butler / Agent Sigma 3 | Charles Butler / Agent Sigma 3 |
 Silvia SolarCatherine | Catherine |
 Armando CalvoKaramesinis | Karamesinis |
| MMia GenbergAnna | Anna |
 Remo De AngelisKarl | Karl |
| SSheila RosinMaylin | Maylin |
 Mario NovelliJoey, Sigma 3's Best Friend | Joey, Sigma 3's Best Friend |
| GGualtiero IsnenghiProfessor Goodwin | Professor Goodwin |
| DDiana MartínNot listed | Not listed |
| WWalter NengNot listed | Not listed |
| LLilian SaxonNot listed | Not listed |
| FFrancisco CebriánNot listed | Not listed |
| AAlberto GadeaNot listed | Not listed |
| CCarmen RogerHerself - Flamenco Dancer | Herself - Flamenco Dancer |
| FFrank HarrisNot listed | Not listed |