A military scientist successfully creates robot soldiers in the shape of crabs, which turn out to be deadly warriors, but soon he discovers that his ambitious invention evolves in unexpected ways.
| Directing | Václav Mergl | Director |
| Camera | Jiří Ševčík | Director of Photography |
| Visual Effects | Václav Mergl | Animation |
| Visual Effects | Zdeněk Šob | Animation |
| Editing | Květa Mašková | Editor |
| Sound | Jiří Kolafa | Original Music Composer |
| Sound | Josef Vaněček | Sound |
| Camera | Boris Baromykin | Director of Photography |
| Sound | Benjamin Astrug | Sound |
| Visual Effects | Zuzana Jupová | Animation |
| Writing | Václav Mergl | Screenplay |
| Writing | Anatoly Dneprov | Short Story |
| Production | Václav Strnad | Production Manager |
| Sound | Miroslav Pokorný | Conductor |
| Art | Václav Mergl | Art Direction |
| Crew | Ladislav Fořt | Dramaturgy |
