Ep 22. Episode 71

Katerina stops Zhadan from killing Makarova, and the latter tells her the whole truth: how Zhadan came up with a blackmail scheme, how Vera figured it out, insulted Zhadan, who couldn't stand it and stabbed her with a knife. Katerina finds out the truth about Zhadan's background, his work for a criminal boss. Zhadan says he regrets everything he had done. Katerina believes him.