"The Lost Boy" shows Blair Waldorf (Leighton Meester) and Chuck Bass (Ed Westwick) plotting against each other when a particular item up for bid at Sotheby's raises their personal interests.
Serena van der Woodsen (Blake Lively) suspects Carter Baizen's (Sebastian Stan) return to his old habits while Georgina Sparks (Michelle Trachtenberg) sets her sights on Dan Humphrey (Penn Badgley).
Secrets are uncovered as Vanessa Abrams (Jessica Szohr) finds that Scott Rosson (Chris Riggi) is Lily and Rufus's real son and Bree Buckley's (Joanna Garcia) intentions with Nate Archibald (Chace Crawford) are revealed.
[2][3] An Upper East Side face-off ensues when Blair and Chuck both set their sights on a particular item up for bid at Sotheby's and the personal stakes are high.
[4] Lively later wore a Matthew Williamson vest, Joie blouse and Rag & Bone skirt when filming the final scene of the episode where Serena meets up with Carter Baizen.
Michelle Graham from Film School Rejects negatively reviewed the character of Scott and his actor, Chris Riggi, noting his lack of presence "[...] if his storyline this week wasn’t so fundamental to the progression of the rest of the season, I’d probably have forgotten him again.