Everything you know, and every belief you know, is about to change. Are you ready for that?

Vampire Diaries viewers had to ask themselves the same question last night, as the game changed last night. No longer is this a series about Stefan hiding himself from Elena.

She now knows... everything.

Stefan and Damon are vampires. They wear rings that protect them from the light. They've been this way since 1864. What role did Katherine actually play in their lives? And what has happened to Vicki?

You'll need to read our detailed recap of "Lost Girls" for those answers.

Did you like the episode? Sound off in our poll now. Also, check out a few classic quotes from the hour below:

Damon: I think I know what can help you.
Vicki: What's that?
Damon: Death. | permalink

Stefan: I've been 17 years old since 1864. | permalink

Stefan: I'm a vampire. | permalink

Stefan: That's the thing about Damon. He doesn't get mad. He just gets even. | permalink

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.