Stefan and Damon, on the other hand, are forced to put their differences aside and work together to stop Klaus. This leads to some interesting interactions between the two brothers, and we see a deeper side of their relationship.

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twist, Elena and Katherine swap places during the climax. When Mikael attacks "Elena" to draw Klaus out of his house, he actually stabs Katherine, who is essentially immune to the injury, allowing her to facilitate the counter-attack. Themes of Loyalty and Humanity