Robert is a SF writer, who realizes that he can make his thoughts material. Because of that, a group of aliens arrives to Earth. Their leader is Andra, who shows affection for Robert, which does not please his girlfriend, Biba. A monster, Mumu, has arrived together with the visitors from space.
| Actor | Role |
|---|---|
 Žarko PotočnjakRobert | Robert |
| LLucie ŽulováBiba | Biba |
 Ksenia ProhaskaAndra | Andra |
| JJasminka AlićUlu | Ulu |
 Rene BitorajacTargo | Targo |
 Ljubiša SamardžićToni | Toni |
 Ivana AndrlováGabi | Gabi |
 Cvijeta MesićCecilie | Cecilie |
 Markéta FišerováStela | Stela |
 Karel AugustaStelin otac | Stelin otac |
| HHermina PipinićStelina majka | Stelina majka |
 Helena Růžičkovágospođa Švarcova | gospođa Švarcova |
 Petr DrozdaMumu | Mumu |
| VVáclav ŠteklPsychiatrist | Psychiatrist |
 Magdaléna HolendrováNot listed | Not listed |
 Edo PeročevićNot listed | Not listed |
 Dana HlaváčováNot listed | Not listed |
| VVěra KalendováNot listed | Not listed |
| VVáclav ŠterclNot listed | Not listed |
 Zvonko LepetićČuvar | Čuvar |
| ZZdena BurdováNot listed | Not listed |
 Jitka ZelenohorskáNot listed | Not listed |
| BBohuslav KupšovskýNot listed | Not listed |
| VVěra ŠperováNot listed | Not listed |
 Ivo GregurevićNot listed | Not listed |
| ZZdena RulcováNot listed | Not listed |
| HHana CharvátováNot listed | Not listed |
| HHana ForejtováNot listed | Not listed |
| KKarel EngelNot listed | Not listed |
| ZZdenka HeršakNot listed | Not listed |