Tonight is the night! The “True Blood” big season finale, “Evil Is Going On” (S3 Ep12), airs at 9/8c on HBO Sunday (September 12). Check out some video previews featuring Sookie, Sam, Tara and Hoyt of the last episode of the third season of “True Blood” (episode 36 overall) below.

True Blood Season 3 Finale SPOILERS: “Evil Is Going On” PHOTOS, VIDEO>>

We can expect a couple of surprises, revelations, a betrayal, Sookie (Anna Paquin), who is finally sick of being “vampire crack”, considering the possibility of leaving Bill (Stephen Moyer) for good… and lots of blood!

True Blood Season Finale Preview Videos