GOSSIP GIRL RETURNS!/VERA WANG MAKES A CAMEO – Through a series of emotional flashbacks, Blair reveals to Serena what really happened in the aftermath of her tragic car accident with Chuck. Meanwhile, Nate discovers information about the accident that suggests possible foul play. Lily is worried by Charlie’s long absence and decides to hire a private detective to track her down. Vera Wang makes a cameo as herself at Blair’s dress fitting. Penn Badgley and Matthew Settle also star. Michael Grossman directed the episode written by Sarah Goodman.