Castiel (Misha Collins) will be back in “Supernatural” Season 15, episode 6. A preview video and pictures from the next episode show the character taking on a new case while the Winchester brothers deal with a witch.

A preview video of the next episode shows Castiel walking through the woods and taking about things in this world that are not human. The character has been missing in the last two episodes. According to the plot synopsis, he will be back to investigate the disappearance of a local teen.

Stills from the next episode that have been released on Entertainment Weekly show Castiel in blood-soaked clothes, and wielding a blood-stained knife in his hand. Will he meet up with the Winchester brothers? The fans may have to wait for a few episodes before that happens, and for now it seems that Castiel will only work on his case.

Castiel has been ignoring the Winchesters after recent events. The brothers on the other hand may continue to try to reach Castiel in “Supernatural” Season 15, episode 6 to warn him about God.

Meanwhile, the brothers will take on a powerful witch in the next episode. The fans will remember Keegan Connor Tracy, the actress plays the role of the witch, as someone who previously played the roles of Karen Giles and Sera Seige.

The promo shows the witch torturing Sam (Jared Padalecki) with some voodoo magic, which means that Dean (Jensen Ackles) will once again have to step up and save his brother. The fans can expect a fair amount of action as the brothers deal with this new threat.

Meanwhile, the first five episodes of the new season are currently available to stream on the CW app. There are no signups or logins required to watch the show on the app.

“Supernatural” Season 15, episode 6 is titled “Golden Time.” It airs on Nov. 21 at 8 p.m. EST on The CW.

Misha Colins will miss everyone after "Supernatural" Season 15 ends. Supernatural/Facebook