Pepe receives a notebook from his great-uncle containing the formula for making an atomic bomb. When some specialists dedicated to science discover it, they begin to send people to steal it.
| Actor | Role |
|---|---|
 Pepe BiondiPepe | Pepe |
 Mariquita GallegosTamara | Tamara |
 Leonor RinaldiMadre de Lilí | Madre de Lilí |
 Beto GianolaSuarez | Suarez |
| SSiro San RománAgente Americano | Agente Americano |
| HHernán GuidoSegundo agente Americano | Segundo agente Americano |
 Vicente AriñoDon Luis | Don Luis |
| MMary AlbanoNot listed | Not listed |
 Mariel ComberLilí | Lilí |
| JJosé Díaz LastraJuan | Juan |
 Elida MarlettaPatricio Davis | Patricio Davis |
| MMariano BauzáTovarich Dimitrek | Tovarich Dimitrek |
| GGerardo ChiarellaTeresa Jackson | Teresa Jackson |
| AArmando QuintanaNegro Zapata | Negro Zapata |
 Carlos ScazziottaMoncho Agrelo | Moncho Agrelo |
 José Carlos MarroneÉl mismo | Él mismo |
 Guillermo BattagliaCientífico | Científico |
 Adolfo LinvelJefe ruso | Jefe ruso |
 Ricardo JordánFeodor | Feodor |
 Zulma GreyNot listed | Not listed |
 Carlos LagrottaJefe de Policía | Jefe de Policía |
 Roberto BordoniEspía | Espía |
| CCarlos Víctor AndrissNot listed | Not listed |
| BBetty SolísNot listed | Not listed |
| JJosefina DanieleNot listed | Not listed |
| RRafael ChumbitoNot listed | Not listed |