Pierre learns that Dolohov is Helene's lover and, at a banquet hosted by Count Rostov in Kutuzov's honor, he is deliberately provoked by his rival. When Dolohov announces aloud that after the banquet he has a date with a rich pretty married woman, Pierre finally loses control and challenges him to a duel. The duel takes place the next day and Pierre seriously wounds Dolohov. After Helene learns what has happened she asks Pierre for a separation, telling him that being his wife has been an embarrassment to her. Denisov, who has had his eye on Natasha, proposes marriage. She like Denisov but does not wish to marry him. A chance meeting at a post-house leads a desolate Pierre to a new way of life. Meanwhile at Tilsit, Napoleon and the Tsar prepare to sign a truce.... (thetvdb.com)