When Birgitte starts a new party, Bent Sejro strongly supports Jacob Kruse at first and even tells on Birgitte. It is as if Sejro is not aware that Kruse nearly killed him by convincing to take the EU post in Brussels in S2E2 ("In Brussels no one can hear you scream"). Kruse knew Sejro was ill and lied to Sejro, his wife and Birgitte. Sejro should be aware of this.
When Katrine and Alexander start to undress each other we see the blue blouse of Katrine ending up on the floor, but in the next cut she is still wearing it when they go down on the floor.