Season 4

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.

Air date	Sep 13, 2010
Episodes	22

Episodes

1. Belles de Jour Sep 13, 2010 · 41 min · ★ 7.6
2. Double Identity Sep 20, 2010 · 41 min · ★ 7.9
3. The Undergraduates Sep 27, 2010 · 42 min · ★ 7.7
4. Touch of Eva Oct 4, 2010 · 42 min · ★ 7.9
5. Goodbye, Columbia Oct 11, 2010 · 42 min · ★ 7.6
6. Easy J Oct 25, 2010 · 41 min · ★ 7.9
7. War at the Roses Nov 1, 2010 · 42 min · ★ 8.0
8. Juliet Doesn't Live Here Anymore Nov 8, 2010 · 42 min · ★ 8.3
9. The Witches of Bushwick Nov 15, 2010 · 42 min · ★ 8.3
10. Gaslit Nov 29, 2010 · 41 min · ★ 7.9
11. The Townie Dec 6, 2010 · 41 min · ★ 8.6
12. The Kids Are Not Alright Jan 24, 2011 · 42 min · ★ 8.1
13. Damien Darko Jan 31, 2011 · 41 min · ★ 8.0
14. Panic Roommate Feb 7, 2011 · 41 min · ★ 8.0
15. It-Girl Happened One Night Feb 14, 2011 · 41 min · ★ 7.6
16. While You Weren't Sleeping Feb 21, 2011 · 42 min · ★ 8.1
17. Empire of the Son Feb 28, 2011 · 41 min · ★ 8.0
18. The Kids Stay in the Picture Apr 18, 2011 · 42 min · ★ 7.6
19. Petty in Pink Apr 25, 2011 · 41 min · ★ 7.4
20. The Princesses and the Frog May 2, 2011 · 41 min · ★ 7.6
21. Shattered Bass May 9, 2011 · 41 min · ★ 7.4
22. The Wrong Goodbye May 16, 2011 · 41 min · ★ 8.2