Pat...

Enjoyed the first series very much (some episodes better than others), and have just started watching the second. The story lines still seem quite good, but I miss the opening sequence of the all the first series episodes, with Pat (perhaps they just ran out of scientific experiments), and then the theme song with the group shot of all the staff and students. Walliams hairdo in the first series also made me laugh.
Glad the music teacher is still there, and Daphne the secretary, but what has happened to Pat?