Season 4, Episode 18:
The Monster At The End Of This BookNot to be confused with the book it was named after.While investigating a haunting, Sam and Dean discover that their lives were written down as a series of books titled Supernatural. They find and confront the writer of the books, Chuck Shurley, only to find that he is a prophet of God. Chuck gives them a copy of his latest work and upon finding out that Sam is going to sleep with Lilith, the brothers do their best to prevent his prophecy from coming true.
Body countFor this episode = Every Body Lives.For the series so far = At least 293 humans (of which 5 were witches), at least 63 demons, 28 ghosts, 10 vampires, 6 changelings, 3 gods, 3 shapeshifters, 3 zombies, 2 angels, 2 werewolves, 1 cat, 1 crocotta, 1 djinn, 1 dog, 1 rakshasa, 1 rawhead, 1 reaper, 1 rougarou, 1 shtriga, 1 siren, and 1 wendigo.