Right, I've just been on Facebook on the page I follow that always posts the new episodes when they come out. And I found this stuff out on there too.

I think all of the theories came true if you guys read the note after P.S, and then there was also this too.

The thing that interests me is the blurb for SM024. If it is an open day, we might see the first reappearance of the person that everyone thinks it is coming back, if I am having another theory of mine. If so, we might not have to wait for the second series for Serena to come back if this is an open day at the school, you never know...