'Supernatural' Sneak Peek- Episode 10.21: Dark Dynasty

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Felicia Day is back in a new episode of Supernatural and she’s teaming up with someone surprising.

This week’s episode should prove interesting, if nothing more than for the verbal sparring matches that are sure to happen when Charlie and Rowena partner up to work on the Book of the Damned. Meanwhile, Dean and Sam are busy trying to solve the newest string of murders and are surprised by what they find.

Keep reading to see what’s ahead on this week’s episode of Supernatural:

Supernatural-Episode 10.23 ‘Dark Dynasty’ Official Description

Dean (Jensen Ackles) and Sam (Jared Padalecki) investigate a bizarre murder and realize the killer bears the same tattoo as those from the Styne family. Eldon Styne (guest star David Hoflin) attacks Dean and a brutal fight ensues. Meanwhile, Castiel (Misha Collins) acts as referee when Charlie (guest star Felicia Day) and Rowena (guest star Ruth Connell) are forced to work together on the Book of the Damned. Crowley (Mark Sheppard) discovers his mother is missing and knows she’s up to something so he turns to an old enemy for help. Robert Singer directed this episode written by Eugenie Ross-Leming & Brad Buckner (#1023). Original airdate 5/6/2015.