Nina Dobrev, Claire Holt Nina Dobrev, Claire Holt

It's a family reunion... sort of!

Elijah (Daniel Gillies) finally returns to The Vampire Diaries Thursday and viewers will be quite surprised by what he's been up to since he last came to Mystic Falls. Suffice it to say, it will be an interesting reunion once he discovers his sister Rebekah (Claire Holt) is working with Elena (Nina Dobrev) to track down the cure. But that won't be the only unexpected thing in Thursday's episode. Check out five more surprises that may shock you:

The Vampire Diaries Bite: What happens when Elena and Katherine face off?

1. Katherine will reveal exactly why she wants the cure.

2. Klaus (Joseph Morgan) will find help with the white oak stake in his back in a very unpredictable place.

3. Stefan (Paul Wesley) will make a shocking declaration. Have tissues ready!

4. The cure will surface during the hour, but who ends up with it will surprise you.

5. Rebekah will make her allegiances quite clear in this episode.

The Vampire Diaries airs Thursdays at 8/7c on The CW.