Ready to another round of spoilers, CW fans?

The network issued a press release yesterday that teased upcoming events on The Vampire Diaries (a major flashback and a dangerous mistake!) and Arrow (who is about to get arrested for murder?), among other programs.

Such as Supernatural. Which characters are on their way back to this long-running favorite? Check out the photo below and the following upcoming episode descriptions for that answer...

October 31 ("Blood Brother"): Dean gets a call from Benny, the vampire he befriended in Purgatory, asking for help after getting into a brutal fight. Dean takes off on a “personal day” to help his friend.  However, when things go bad, Dean calls Sam for help.

November 7 ("Southern Comfort"): Sam and Dean go to Missouri to investigate a murder and find that Garth is already on the case, and the murderer is an avenging ghost.

November 14 ("A Little Slice of Kevin"): Mrs. Tran and Kevin work to concoct a demon bomb to use against Crowley, and Sam and Dean are stunned when Castiel appears and tells them he escaped from Purgatory.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.