Two worlds of superfans are on the verge of collision as Buffy the Vampire Slayer series alums Charisma Carpenter and James Marsters will both guest star in the fifth episode of the seventh season of Supernatural. The episode, titled "Shut Up, Dr. Phil," will see the two playing husband and wife but obviously with a supernatural twist. Carpenter will play a witch on a rampage after Marsters' character wrongs her in some way. Showrunner Sera Gamble describes their dynamic rather dramatically to TV Line:

"This episode is Bewitched gone wrong. [It was] all upside for this successful man while he was married to the witch, but now that he’s pissed her off, the whole town is paying the price.”

Sounds like it should be quite a fun reunion for Buffy fans, and a bit of a role reversal for the stars since Marsters played a vampire on the series, while Carpenter played a slayer. The new season of Supernatural starts Friday, September 23rd.