Watch Gossip Girl S4E5: Goodbye, Columbia An image wrecking rumor about Serena was sent by an unknown Gossip Girl. Meanwhile, Blair makes some move to be in the class of Martha, who is a powerful businesswoman that is lecturing at Columbia as a guest speaker. But her plan of trying to be Martha’s assistant has been derailed by someone unexpected. The latest installment of our favorite privileged teenagers of Gossip Girl, which is entitled “Goodbye, Columbia” is the hit drama TV show’s 5th episode of the 4th season that aired last 10/11/2010 Monday at 9:00 PM on CW. Watch Gossip Girl 4×5(0405) Free Online Streaming Full Episodes Replay of the Latest Season and Video Clip Download Link: HERE