Crowley? Yes.

Guest stars: Ruth Connell (Rowena), Theo Devaney (Gavin MaCleod), Amy Gummenick (Young Mary Winchester)

there may be a Rugaru
This may be the episode where we learn more about Crowley’s past. “How Fergus became Crowley.”
It seems like Rowena and Mary may finally be meeting?
A scene was filmed in the Impala with Sam and Dean in front and Rowena and another male (Gavin?) in the back.
Misha appeared on Livewire radio during filming (12/9) - did not mention any filming spoilers

SAM AND DEAN ASK ROWENA TO FIND CROWLEY’S SON – When Sam (Jared Padalecki) and Dean (Jensen Ackles) look into a murder at a museum, they learn a ghost from a merchant ship that sunk in 1723 may be at the heart of the mystery. After realizing “The Star” was the same ship that Crowley’s (Mark A. Sheppard) son Gavin McLeod (guest star Theo Devaney) should have been aboard, they enlist help from Rowena (guest star Ruth Connell) to track Gavin down. Kelly Kline (guest star Courtney Ford), still pregnant with Lucifer’s child, takes refuge with a demon after an angel attempts to kill her. PJ Pesce directed the episode written by Brad Buckner and Eugenie Ross-Leming (#1213). Original airdate 2/23/2107.

Anything on Gavin’s return to Supernatural? —Tim
Gavin’s return will happen very soon, and his arrival will have quite an effect on Rowena. According to Ruth Connell, she had a little bit of trouble rationalizing Rowena’s actions in that hour: “I was like, really? She really just did that?!” I’m not sure what exactly goes down, but Connell did say “it’s to do with Gavin coming back and her having a grandson, so there’s a lot more to be found out about Rowena.”