As multiple Vampire Diaries spoilers have revealed, there will be a number of twists, turns and cliffhangers on the show's midseason finale, "By the Light of the Moon."

But one thing we know for certain: Tyler will undergo his first transformation into a werewolf.

Caroline will help him prepare for this monumental, painful event, as teased below. Check out a clip of this burgeoning couple doing everything it can to keep Tyler and those around him safe.

Now, go watch the official preview for "By the Light of the Moon" and ask yourself: No way Stefan really hooks up with Katherine... right?!?

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