"True Blood" season 6 sneak peek: Bill's new powers frighten

"True Blood" returns for another season of blood-sucking bedlam on Sunday and ET Online has snagged a few clips from season 6 to satisfy your appetite in the interim.

In the sneak peek of the vampire series based on Charlaine Harris' novel series The Southern Vampire Mysteries, we get a glimpse of how powerful Bill (Stephen Moyer) is after his blood regeneration, which startle the other vampires.

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"I am Bill Compton, though clearly I am something more. I see that now. I see everything so differently now," he says as Sookie (Anna Paquin), Jessica (Deborah Ann Woll), Eric (Alexander Skarsgard), and Nora (Lucy Griffiths) look on in bewilderment.

Bill isn't the only one shocking and awing in the beginning of Season 6, though. Eric shocks Pam (Kristin Bauer van Straten) when she discovers that he has a sister whom he never mentioned to her.

What's even more startling and suspicious is Eric's response to Pam's inquiry, as he snaps at her and tells her, "This is not the time! Get over it and have my back or get out of my face!"

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Sookie, too, has a revelation in the beginning of the season, but on a lighter note, as she stumbles upon a handsome stranger on the way to work who happens to have faerie abilities like hers.

Watch the clips below for a sneak peek at the beginning of Season 6, and check out the premiere of "True Blood" this Sunday at 9 p.m. ET on HBO.