We left off with Klaus in Tyler's body, which means Michael Trevino has to play two characters this season. Trevino himself as said it was complicated, but he had a lot of fun with it. It's no secret that the cast members like to play pranks on each other. Candice Accola, who plays Caroline, got Trevino good. While filming an intimate scene for season four where Tyler/Klaus is on top of Caroline, Trevino felt something strange in between Accola's legs. It turns out, she put a banana there to see whether or not he would comment. Michael says he was too afraid to say anything, thinking it was a personal problem.