Tonight's Gossip Girl episode, "The Age of Dissonance," was the 18th episode of the now completed second season. This episode tied up several story lines and set the stage for subsequent episodes - and romantic developments - to come later on.

In an unusual role reversal, Blair Waldorf found herself being the target of attacks, while Chuck Bass set out to find mystery girl Elle, Dan Humphrey slept with Rachel Carr, and Nate and Vanessa tried to make their strange relationship work.

For the full details, read all about it on our recap! For some memorable lines and images, check out our gallery, videos, music guide and list of quotes, as well.

Our Gossip Girl fashion breakdown and staff Round Table complete our coverage of this episode. Thanks for reading and watching with Gossip Girl Insider!

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.