THURSDAY, DECEMBER 22
"THE VAMPIRE DIARIES" - (8:00-9:00 p.m. ET)
"Ordinary People" (TV-14, LV) (HDTV)
THE ORIGINAL FAMILY - With help from Elena (Nina Dobrev) and Bonnie (Kat Graham), Alaric (Matt Davis) tries to decipher the meaning behind his recent discovery Elena (Nina Dobrev) and Rebekah (guest star Claire Holt) engage in a mean-girl power struggle, until Rebekah finally reveals some of her family's ancient secrets and the violent past she shares with Klaus (Joseph Morgan) and Elijah (Daniel Gillies). Damon (Ian Somerhalder) tries a reckless new approach to make a breakthrough with Stefan (Paul Wesley), and they're both surprised by an unlikely ally. J. Miller Tobin directed the episode with teleplay by Caroline Dries & Julie Plec and story by Nick Wauters (#308).