I Am Your Friend, Luna

One of my favorite returns to Hogwarts is from sixth year, from the movie Harry Potter and the Half-Blood Prince, where Harry and Luna were walking together through the Hogwarts gate after Luna saved Harry in the Hogwarts Express and they missed carriages. It is a lot about friendship, which is why I like it so much. Luna told Harry, that "it was like being with a friend", and Harry answered her "Oh, I am your friend, Luna". It was really sentimental.

And my kids love the moment, when professor Flitwick asked Harry about his name and then said "No exceptions, Potter". Doesn´t matter how many times they see it, it makes them laugh. 

Besides Harry, Luna and professor Flitwick, there are two aurors and a scene where Argus Filch argued with Draco Malfoy about his walking stick and professor Snape helped Draco.