MONDAY, August 22
"GOSSIP GIRL" - (8:00-9:00 p.m. ET)
"The Princesses and the Frog" (TV-14, D) (HDTV)
IT'S WAR BETWEEN SERENA AND BLAIR - Blair's (Leighton Meester) dreams appear to be coming true, but Serena (Blake Lively) threatens to jeopardize it all by dredging up Blair's past. Charlie (guest star Kaylee DeFer) befriends Vanessa (Jessica Szohr), who may or may not have a hidden agenda. Nate (Chace Crawford) is torn between his relationship with Raina (guest star Tika Sumpter) and a truth he must keep hidden out of loyalty to Chuck (Ed Westwick). Jessica Szohr, Kelly Rutherford and Matthew Settle also star. Andrew McCarthy directed the episode written by Leila Gerstein (#420).