A Mystery Known to All (1981)
| Release Date: | 1981, June 1 |
| Directors: | Nikolay Zaseev-Rudenko |
| Countries: | Soviet Union |
| Production: | Dovzhenko Film Studios |
| Cast: | Mykola Hrynko, Valeriy Nosik, Yuriy Sarantsev, Zinovi Vysokovsky, Nadezhda Rumyantseva, Yuriy Nikolaev, Yulya Zhivotvorova, Yuri Prokhoda, Sergey Alekseev |