What lengths will Dean go to in order to free Sam?

We'll find out on Supernatural Season 9 Episode 10.

Titled "Road Trip," the installment will find Sam and Castiel growing desperate in their attempt to separate Sam from Gadreel, having to turn to Crowley for advice.

Of course, he says he can't actually tell them how to crack open an angel. He must show them. And he's willing to do so, as long as they agree to his terms. And what are those terms? Find out now:

The series finally returns on January 14 and you can watch Supernatural online here in order to catch up prior to the 2014 premiere.

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