Departure (2019)

S2E12 It's a Wonderful Lie

During the Snowflake dance, Blair and Chuck stumble upon their doppelgängers getting cozy. Meanwhile, Aaron's former girlfriend Lexi flirts with Dan, stirring up tension between him and Serena. Nate, Jenny, and Vanessa find themselves in a complicated love triangle involving a missing letter and a dress that reveals too much. As the night unfolds, Bart Bass gets into a car accident while heading to the event.