Elena is the doppleganger. She must be protected.

Viewers of The Vampire Diaries weren't the only ones to be confused by these words from Katherine to conclude last week's episode.

Damon was left perplexed by his long-term love/nemesis, while Stefan shares the same reaction in the following clip. Upon hearing Katherine's cryptic message, he seems intent on visiting the tomb and asking the ancient vampire more about why Elena has been kidnapped. Check out the sneak peek at "Rose" now:

[video url="http://www.tvfanatic.com/videos/debate-over-katherine/" title="Debate Over Katherine"] [/video]

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