'Supernatural' Season 10 Plot Spoilers, Recap: 200th Episode Fan Fiction

In its 200th episode last Tuesday, Nov. 11, "Supernatural" featured the fan fiction stories that have arisen around the show and included elements from many such stories.
Currently on its 10th season, "Supernatural" airs every Tuesday at 9/8c on the CW.
Last Tuesday's episode saw a whole lot of melodrama as the brothers Sam (Jared Padalecki) and Dean (Jensen Ackles) Winchester were called to school to investigate the disappearance of a drama teacher after she threatens to stop a play.
When Sam and Dean arrive at the school, they find that the musical is being staged by an all-girls troupe. The play is based on the Supernatural book series and revolves around their characters.
This revelation stunned Sam and Dean who barely manage to conceal their real identities.
Dean later finds out from Marie, the creator of the play, that the second act features him becoming a girl temporarily. Robots and ninjas will likewise appear.
Dean tries to explain to Marie that the events described in the play were actually those of Sam. Marie appears surprised, saying his version is the "worst fan fiction."
Just as the brothers decide that there is no case involving the supernatural, another cast member who opposes the play is abducted by a scarecrow. They decide to stay and investigate further. They would later discover that Calliope is behind the abductions and that she wants the play to be staged. After the play is staged, Calliope will eat the creator who happens to be Marie.
The rest of the episode sees how Dean and Sam are able to fight off Calliope and her scarecrow and kill them. While leaving, Marie gives Dean the Samulet which she has been using as a prop in the play.