Jan Zika is the legendary hero of the communist resistance movement during World War II and leading functionary of the second underground Central Committee of the Communist Party of Czechoslovakia.

František Vicena
as Jan Zika

Wilhelm Koch-Hooge
as Friedrich

Zdeněk Kampf
as Nergl

Vlasta Vlasáková
as Milada

Eva Jiroušková
as Blazena Preislerová

Oldřich Velen
as Josef Preisler

Jürgen Frohriep
as Nemecký chirurg

Miloslav Holub
as Jankovský

Alena Walterová
as Ziková

Jindřich Narenta
as