Duration: 42m

TV-14 7.8 Drama / Mystery / Romance

Gossip Girl S4E7

Blair is shocked by a surprise guest at her birthday party; Serena and Nate plan an intervention for Chuck and Blair.

Release Date: November 1, 2010 (USA)

Creator: Stephanie Savage & Josh Schwartz

Cast: Blake Lively, Leighton Meester, Penn Badgley, Chace Crawford, Ed Westwick, Kelly Rutherford, Matthew Settle, Taylor Momsen, Jessica Szohr