This episode's script wasn't written by Urobuchi Gen for the 1st time BTW (the original story draft is still his though) - scriptwriter this time is playwright Takaha Aya (for the 1st time again), it was announced that she will participate in this arcticle:
http://www.animenewsnetwork.com/inte...cho-pass-songs
Previous episodes were all written by Urobuchi Gen & Fukami Makoto.