So, who is it?
Take a look our reaction to the biggest storylines on tonight's Teen Wolf to find out!
Darach Revealed: Prepare to be shocked. The Darach, who has been freaking out the whole town of Beacon Hills with a killing spree, finally showed off its true identity. It was none other than Ms. Blake! Yup, the same Ms. Blake that Derek has been making out with. He fell in love with a monster (literally).
Lydia the Banshee: Not only did we find out Ms. Blake's true identity, but we also found out Lydia's: she's a banshee (which finally explains all of her screaming)! Ms. Blake was the one that revealed what Lydia really is, after Lydia let out a piercing scream that startled everyone within earshot when Ms. Blake tried to kill her. We cannot wait to see what this will mean for Lydia on future episodes.
Stiles' Dad: When The Darach tries to kill Lydia. Stiles' dad jumps in just in time to save her. When it came to saving him though, Stiles and Scott were no match up for the Darach. The Darach takes Stiles' dad--stabs him and runs off with his body...and he's still missing. It's not clear whether or not he's dead though.
What did you think of this week's Teen Wolf?
Sound off in the comments.
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Gallery | 'Teen Wolf' on the Red Carpet