How are you gonna control the Devil when you can't control yourself?

Bobby poses this vital question on next week's episode of Supernatural.

Titled "The Devil You Know," it focuses on a deal proposed by the demon Crowley: he tells the brothers he can help them find the remaining Horsemen rings so they can trap Lucifer.  However, when Brady - the Handler for Pestilence and Death - has a change of heart, he sends Pestilence after the Winchesters.

Check out the episode's official CW promo now:

[video url="http://www.tvfanatic.com/videos/the-devil-you-know-promo/" title="The Devil You Know Promo"] [/video]

We've also updated our Supernatural quotes section after this week's installment. Read and enjoy!

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.