Preview the Supernatural mid-season finale, “The Things We Left Behind,” with the episode synopsis, promotional stills, trailer, and clip.

Previously, despite being cured of being a demon, Dean struggled against the bloodlust of the Mark of Cain. Meanwhile, the brothers came across a 300-year-old witch, Rowena, capable of killing demons with her magic. However, after Cole interrupted their confrontation, Rowena escaped — only to be captured by Crowley’s demons. But when Crowley confronted her, he recognized Rowena as his mother.

Meanwhile, Hannah and Castiel continued on their mission to find rogue angels. But when they ran into the husband of Hannah’s vessel, Hannah realized it was time to start putting the humans first and returned to Heaven. This inspired Castiel to look into Jimmy Novak’s connections.

Meanwhile, the brothers joined Sheriffs Jody Mills and Donna Hanscum for a vampire hunt.

Read our recap for Supernatural season 10, episode 8, “Hibbing 911,” here.

The official synopsis for Supernatural season 10, episode 9, “The Things We Left Behind,” reads:

“CASTIEL REUNITES WITH JIMMY’S DAUGHTER CLAIRE — Castiel (Misha Collins) finds Jimmy’s daughter Claire (guest star Kathyrn Love Newton) in a group home and she convinces him to break her out. After she runs away from him, Castiel calls Sam (Jared Padalecki) and Dean (Jensen Ackles) to help find her before she gets in trouble. Meanwhile, Crowley (Mark A. Sheppard) faces his biggest challenge yet. Tim Andrew directed this episode with teleplay by Jenny Klein and story by Jenny Klein & Phil Sgriccia (#1009).”

Meanwhile, promotional stills show the Winchesters alongside Castiel and Crowley holding Rowena captive:

Finally, watch a trailer for and a clip from the episode:

Supernatural season 10, episode 9, “The Things We Left Behind,” airs Tuesday, December 9 at 9:00 ET on The CW.

Will you watch the ‘Supernatural’ mid-season finale?