Secrets of the Investigation. The Last Century (2019)
| First Air Date: | 2019, December 30 |
| Last Air Date: | 2019, December 30 |
| Status: | Ended |
| Seasons: | 1 |
| Episodes: | 4 |
| Countries: | Russia |
| Production: | Progress Plus Studio |
| Cast: | Aleksandr Novikov, Oleg Almazov, Tatyana Polonskaya, Sergei Parshin, Anna Kovalchuk, Aleksandr Chevychelov, Natalya Kutasova, Aleksander Shpilko, Gennadiy Alimpiev, Andrey Sharkov, Vyacheslav Zakharov, Nikolay Burov |