Trailer
Images
 | Paolo Panelli as X1 |
 | Carlo Croccolo as X4 |
 | Enzo Garinei as X3 |
 | Alfredo Landa as X2 |
 | Magali Noël as Matilde Bernabei |
 | Ciccio Ingrassia as Lo scrittore di fantascienza |
 | Franco Franchi as Socio dello scrittore |
 | Pietro De Vico as Cameriere d'Hotel |
 | Valeria Fabrizi as Cameriera d'Hotel |
| Nando Martellini as Se stesso |
 | Umberto D'Orsi as L'editore |
 | Riccardo Billi as Tifoso di calcio |
 | Francesco Mulè as Ambasciatore austriaco |
 | Lando Buzzanca as Lo sposo |
 | Mario De Simone as Passante che parla con X1 |
 | Margaret Lee as Segretaria dell'editore |
 | Tullio Altamura as Professore di matematica |
 | Nerio Bernardi as Sottosegretario esteri |
 | Dominique Boschero as La sposa |
 | Alicia Brandet as Frida, cantante lirica |
 | José Calvo as Marito geloso |
| Eva Darin |
 | Thea Fleming |
 | Agata Flori as Ragazza in bikini |
| Jenny Folchi |
 | Corinne Fontaine as Ragazza francese |
 | Cristina Gaïoni as Figlia del contadino |
 | Aldo Giuffrè as Il protettore di prostitute |
 | Annie Gorassini as Ragazza in bikini |
 | Margaret Rose Keil |
 | Salvo Libassi as Salumiere |
 | Rosemarie Lindt |
 | Mimmo Poli as Tifoso allo stadio |
 | Lucia Modugno |
 | Bruno Scipioni |
 | Seyna Seyn as Ragazza asiatica |
| Alfredo Tasso |
 | José María Tasso |
 | Elena María Tejeiro |
 | Ángel Ter |
 | Pietro Tordi as Contadino abruzzese |
| Renato Turi as La Grande Mente (voice) |
 | Max Turilli as Segretario dell'ambasciatore |
 | Raimondo Vianello |
 | Jimmy il Fenomeno as Venditore di bibite allo stadio (uncredited) |
| Nico Rienzi as Narratore (uncredited) |
 | Rossana Canghiari as Party Guest (uncredited) |
| Production | |
| Manuel Pérez | Line Producer |
Art | |
| Giorgio Giovannini | Production Design |
Writing | |
| Castellano | Story |
| Castellano | Screenplay |
| Pipolo | Story |
Sound | |
| Ennio Morricone | Original Music Composer |
Editing | |
| Petra de Nieva | Co-Editor |
Directing | |
| Sinesio Isla | Second Assistant Director |
Writing | |
| Pipolo | Screenplay |
Sound | |
| Luigi Puri | Sound |
Production | |
| Carlo Bartolini | Unit Manager |
Directing | |
| Castellano | Director |
| Pipolo | Director |
Costume & Make-Up | |
| Amato Garbini | Makeup Artist |
| Rosa Luciani | Hairstylist |
Directing | |
| Emilio P. Miraglia | First Assistant Director |
Art | |
| Ramiro Gómez | Production Design |
Camera | |
| Alfio Contini | Director of Photography |
Editing | |
| Gisa Radicchi Levi | Editor |
Camera | |
| Maurizio Scanzani | Camera Operator |
Production | |
| Dario Sabatello | Producer |
Editing | |
| Marina Sacco | Assistant Editor |
Production | |
| Sergio Iacobis | Production Manager |
Art | |
| Massimo Tavazzi | Set Decoration |
Directing | |
| Marcello Pandolfi | Second Assistant Director |
Production | |
| Renato Rizzuto | Production Secretary |
Costume & Make-Up | |
| Cesare Rovatti | Costume Design |
