Missing scene
I was very surprised that there was never a scene between Kasper and Katrine after he gives her his box of secrets to look at. I was certain there would be a very dramatic scene in which they both talk about the contents of the box. But, no, the box was never mentioned again, Kasper seems happier, and the season came to a conclusion.
I wonder if a scene was originally written, maybe filmed, but then ended up on the cutting room floor? (If such a thing even exists these days.)