The Key
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.
- Genre: Drama, History
- Director: Vladimír Čech
- Cast: František Vicena, Wilhelm Koch-Hooge, Zdeněk Kampf, Vlasta Vlasáková, Eva Jiroušková
- Country: Czechoslovakia