Damon has a plan for Mason Lockwood. It's previewed in this clip from the episode "Memory Lane." Watch now.
What else do you need to know about "Memory Lane" but this: Katherine and Elena will come face-to-face. Check out the official promo here.

The Vampire Diaries Season 2 Episode 4 Quotes

Stefan: Why are you back in town?
Katherine: Three reasons: you, you, and you.

I could rip you to shreds and do my nails at the same time.