While this past week's 'Supernatural' episode "Bitten" may have gone a bit off the beaten path with its found-footage format, next week it'll be back to business as usual for the Winchesters with their latest effort "Blood Brother." And unlike the recent "Heartache," "Blood Brother" will put us back in the main storyline as Dean answers a cry for help from his new vampire buddy Benny. When Sam finds out, though, will he understand? Find out in the latest clip!

Through witches, faeries, demons and more, 'Supernatural' has never quite made friends with the enemy... until now. Next week's episode "Blood Brother" will see Dean honoring his debt to the vampire Benny, as the escaped bloodsucker gets into a bit of trouble of his own. Dean leaves to attend to Benny's woes as a personal matter, but what of Sam?

Based on the latest clip from "Blood Brother," Sam has a hard time understanding what, if anything could pull Dean off the trail of Kevin Tran, Crowley and the demon-banishing tablet, given that Dean rarely takes personal days. But then again, Sam took off a whole year to himself, so what right has he to complain?

So, what do you think? Will Sam find out that his brother's new friend is a vampire? How might he react? Check out the first-look clip from 'Supernatural's' "Blood Brother" below, and tell us what you think in the comments!