'Supernatural' Season 10 Spoilers: Crowley And Castiel To Team Up, Winchester Brothers Showdown Teased In Episode 3 Synopsis And Promo Video

A promo video for the next "Supernatural" Season 10 episode further proves that Dean Winchester (Jensen Ackles) has gone dark and his brotherly love for Sam (Jared Padalecki) went up in smokes. Additionally, Crowley (Mark Sheppard) and Castiel (Misha Collins) will cross paths and team up in "Supernatural" Season 10, episode 3 titled "Soul Survivor."

The storyline on Demon Dean will continue in the next episode with the Mark of Cain as the reason for Dean's behaviour and Crowley's business problem in Hell. The brief promo video shows the Winchester brothers in a cat-and-mouse chase in the Men of Letters bunker.

"Sammy, you can blame yourself for me getting loose," demon Dean stated while looking for his brother. "I don't wanna leave 'til I find you. Let's finish this game," Dean further declared.

Meanwhile, Castiel and Hannah (Erica Carroll) will be on a road that is dangerous and deadly conflicts will arise. "It's hell," Crowley stated. Watch the promo video below.

With Castiel's fading grace still an issue, it looks like the angel will once again be wounded in the upcoming new episode. Furthermore, the episode synopsis teased that the King of Hell and the angel will become unlikely allies in "Soul Survivor."

As a recap, Crowley realized in the previous episode titled "Reichenbach" that Dean's uncontrollable behaviour is becoming a problem for his business in Hell. In the upcoming new episode, Crowley will be reaching out to Castiel to work on the King of Hell's issue with demon Dean.

"Soul Survivor - Sam (Jared Padalecki) continues his efforts to save Dean (Jensen Ackles) from the Mark of Cain. Crowley (Mark Sheppard) realizes Dean's demonic antics are starting to cause problems for him in Hell so he searches out an unlikely ally - Castiel (Misha Collins)," the synopsis for "Supernatural" Season 10, episode 3 reads in a Comic Book Movie report.

The upcoming episode will also be interesting to watch because "Supernatural" cast member Jensen Ackles directed it. The 36-year-old actor has already directed some episodes of the CW TV series in the past seasons such as the fourth episode from season 6 titled "Weekend at Bobby's," the third episode from season 7 titled "The Girl Next Door" and the third episode from season 8 titled "Heartache."

"Supernatural" Season 10, episode 3 titled "Soul Survivor" will air on Tuesday night, Oct. 21, at 9 p.m. ET on the CW Network.