No, that headline was not a typo. It’s true. Supernatural has begun filming for their 300th episode today!
There’s no official release date for the episode yet, but it is expected that it will air sometime in February. If looking back at the 100th and 200th episodes (“Point of No Return” and “Fan Fiction” respectfully) is any indication, 300 will be something truly special.
Good luck to all of the Supernatural cast and crew working on this momentous episode.