Sara Goodman

After a run-in with an increasingly paranoid Bart, Blair grows alarmingly concerned for Chuck's safety. However, feeling confident that his father will never hurt him, Chuck makes a deal that could change his life. Also available on Xfinity, CW, iTunes, Amazon Instant Video and VUDU

After Blair's mother, Eleanor (recurring guest star MARGARET COLIN), gives Blair an ultimatum, Blair is even more determined to remedy Waldorf Designs' problems by making a splash with a dress at the upcoming Cotillion - but a shocking revelation at the ballaffects everyone. Serena becomes worried about Steven's (recurring guest star BARRY WATSON) attitude toward her, but after some investigating she discovers the surprising reason why. Chuck finds an unlikely ally as he tries to drive a wedge between Bart (recurring guest star ROBERT JOHN BURKE) and Lily's relationship to help expose his father's secret. Meanwhile, Dan publishes another article, but the effect is just the opposite of what he was hoping for. Also available on Amazon Instant Video and VUDU

When Gossip Girl goes after Blair, Serena admits she may have played a role in Blair's latest nightmare. Plus, will Blair choose Chuck or Dan? Also available on iTunes, Amazon Instant Video and VUDU

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. Also available on Netflix, Amazon Instant Video and VUDU