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Assen Milanov as Major Terziev |
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Nikola Galabov as Leytenant Kirov |
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Andrey Chaprazov as Engineer Ablamov |
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Валентина Борисова as Yuliya Beleva |
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Lyubomir Dimitrov as Lechev |
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Yordan Matev as Prodanov |
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Ivan Hadzhirachev as Direktor |
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Sonya Vasileva as The laboratory assistant |
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Georgi Popov as Operator |
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Leo Conforti as Bay Stoyan |
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Mariya Stefanova as Lyubka |
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Nadezhda Vakavchieva as |
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Dimitar Panov as |
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Tzenko Boyadzhiev as |
| Camera | Georgi Georgiev | Director of Photography |
| Art | Tzenko Boyadzhiev | Production Design |
| Sound | Peter Stupel | Original Music Composer |
| Directing | Petar B. Vasilev | Director |
| Writing | Pavel Vezhinov | Writer |
