THURSDAY, DECEMBER 15

"THE SECRET CIRCLE" - (9:00-10:00 p.m. ET)

"Slither" (TV-14, LV) (HDTV)

CASSIE IS TORN BETWEEN HER FAMILY AND THE CIRCLE - Torn between her loyalties to the Circle and her family, Cassie (Britt Robertson) wrestles with the secrets she must keep from her grandmother (Ashley Crow). Nick (Louis Hunter) is thrown for a loop when Melissa (Jessica Parker Kennedy) adopts a new attitude and enlists his help to track down her family's Book of Shadows. Faye (Phoebe Tonkin) is also recruited but isn't happy about being the third wheel. Meanwhile, Diana (Shelley Hennig) is craving some alone time with Adam (Thomas Dekker) and arranges a date night so they can rekindle the spark in their relationship, but all six of them are brought together to fight off a dark force that threatens to destroy the Circle from within. Completely unaware of the new danger encroaching on their children, Dawn (Natasha Henstridge) joins Charles (Gale Harold) aboard his boat to further their plans for the Circle, but is surprised to find that Charles may have more than business on his mind. Liz Friedlander directed the episode written by Dana Baratta (#105).