Assen Milanov

Major Terziev

Nikola Galabov

Leytenant Kirov

Andrey Chaprazov

Engineer Ablamov

Valentina Borisova

Yuliya Beleva

Lyubomir Dimitrov

Lechev

Yordan Matev

Prodanov

Ivan Hadzhirachev

Direktor

Sonya Vasileva

The laboratory assistant

Georgi Popov

Operator

Leo Conforti

Bay Stoyan

Mariya Stefanova

Lyubka

Nadezhda Vakavchieva

Dimitar Panov

Tzenko Boyadzhiev

Petar B. Vasilev