Every episode of The Vampire Diaries on The CW is a big episode thanks to the pace set forth by executive producers Kevin Williamson and Julie Plec. But tonight’s promises to be extra revealing: We finally learn about Katherine’s diabolical master plan. “After nine episodes of that question — ‘What are you doing back in town? What is it that you want? Why are you here?’ — finally, she explains herself,” Plec says. “We are incredibly proud of this episode, mostly because the work Nina Dobrev does is unbelievable. She plays Katherine as a human in Bulgaria with a Bulgarian accent, she plays human Katherine pretending to be English in the English countryside, she plays Katherine as a vampire in present day, she plays Elena. And a good portion of the episode is Elena and Katherine having a conversation, so she’s essentially acting opposite nothing, a stand-in or air. This is her episode to shine.” We chatted more with Plec, a master teaser, to find out what’s going down tonight (including who will be shirtless — you’re welcome!) and what’s to come. Check it out below.