Actors James Marsters and Charisma Carpenter, who played Spike and Cordelia on Buffy the Vampire Slayer and its spin-off Angel, are to appear as husband and wife in an upcoming episode of Supernatural.

In the fifth episode of the seventh season, “Shut up, Dr. Phil,” Carpenter will portray a witch on the rampage after Marsters’ character “does her wrong”, according to The Hollywood Reporter. Carpenter is also making guest appearances on Burn Notice this season, while Marsters has recently been seen on the Battlestar Galactica prequel Caprica.

Supernatural returns to the CW on September 23.