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"Michelle Trachtenberg will will return to Gossip Girl for its third season finale, according to TV Guide. The actress, who currently stars on NBC medical drama Mercy, will reprise her role as Georgina Sparks for an episode scheduled to air later this season. It was also announced that her former co-star Connor Paolo - Eric Van Der Woodsen in Gossip - will guest star on Mercy in the upcoming March 3 episode. Paolo, who is filming his Mercy scenes this week, will play someone who sets off a pipe bomb on a bus. Mercy continues Tuesdays at 8pm on NBC, and Gossip Girl returns Monday, March 8 on The CW. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/gossip-girl/news/a201615/gossip-girl-mercy-for-cast-swap/>