While Peter is haunted by the idea that Olga is Alexander's mistress, Evdokia and Kuragin are trying to draw his attention to something else - he must marry Ksenia. Alexander trusts Peter infinitely. Unaware of Cherkasov's experiences, he sets Olga a date in his chambers and asks Peter to stand on the clock. Peter cannot refuse the emperor - the name of the lady was not called. Czartoryski, who found Olga in Alexander's arms, tells Elizabeth about everything.