Sandra Gonzalez
September 26, 2011 at 12:00 PM EDT

I’ve already raved about how Friday’s episode of Supernatural was truly one of the scariest ever, and this exclusive promo takes aim at yet other portion of my fear-laden psyche.

In the video, which you can watch below, we learn that the Leviathan have started using the water supply as means of getting around, causing strange mutations to take place. (I get squirmy just thinking about drinking anything unfiltered.) We also get another glimpse at Sam’s post-hell struggle with hallucinations. The only benefit of his issues? The fact that we apparently get to see a lot of Mark Pellegrino this season! 

Meanwhile, it’s becoming increasingly clear that Dean’s having trouble dealing with their seven seasons years of bad luck (I blame their mirror-breaking actions in season 1’s “Bloody Mary”) and there’s no indication quite yet what effect that will have on him. Let’s just hope he stays out of hallucinating Sam’s line of fire long enough to find out.

Take a look below!

Follow Sandra on Twitter: @EWSandraG

Read more:

DJ Qualls tweets police run-in while working on ‘Supernatural’

‘Supernatural’ DVD sneak peek: Jensen Ackles, Jared Padalecki talk human souls — EXCLUSIVE VIDEO

Jared Padalecki talks ‘Supernatural’ season 7 and how Friday rivals ‘Fringe’ and ‘Grimm’ can ‘bring it.’

You May Like