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On Monday’s episode, Serena (wearing an Opening Ceremony trench and carrying a YSL bag) finally reunites with her elusive father, Dr. William van der Woodsen (played by William Baldwin). Her happy moment is brief when she discovers the reason for his return and finds Nate and Jenny in a compromising position. Click on to get more dish about Monday’s episode (airing April 26th at 8 p.m. EST on the CW) and find out exactly what the girls are wearing—head-to-toe!