Season four’s main mystery revolves around Juliet Sharp, a secretive girl with an agenda against Serena involving her past. The second half of the season builds on the complications of Serena’s new found relationship with her former teacher Colin, Chuck trying to regain control of Bass Industries from Russell Thorpe, and Dan and Blair’s growing friendship. The season also focuses on Lily’s past betrayals coming back to haunt her; Chuck and Blair’s tumultuous relationship after their break up; Dan and Vanessa’s deteriorating friendship; and the arrival of Serena’s cousin Charlie Rhodes to the Upper East Side. By the end of the season, Blair has ignored Chuck, Dan has told Vanessa they are no longer friends, and Serena is on that single grind.
4 - 1Belles de Jour Feb. 21, 2011
4 - 2Double Identity Feb. 28, 2011
4 - 3The Undergraduates Mar. 07, 2011
4 - 4Touch of Eva Mar. 14, 2011
4 - 5Goodbye, Columbia Mar. 21, 2011
4 - 6Easy J Mar. 28, 2011
4 - 7War at the Roses Apr. 04, 2011
4 - 8Juliet Doesn’t Live Here Anymore Apr. 11, 2011
4 - 9The Witches of Bushwick Apr. 18, 2011
4 - 10Gaslit Apr. 25, 2011
4 - 11The Townie May. 02, 2011
4 - 12The Kids Are Not All Right May. 09, 2011
4 - 13Damien Darko May. 16, 2011
4 - 14Panic Roommate May. 23, 2011
4 - 15It-Girl Happened One Night May. 30, 2011
4 - 16While You Weren't Sleeping Jun. 06, 2011
4 - 17Empire Of The Son Jun. 13, 2011
4 - 18The Kids Stay in the Picture Jun. 20, 2011
4 - 19Petty in Pink Jun. 27, 2011
4 - 20The Princesses and the Frog Jul. 04, 2011
4 - 21Shattered Bass Jul. 11, 2011
4 - 22The Wrong Goodbye Jul. 18, 2011