Ivy finds an unlikely ally in William.
Spotted: Our favourite Upper East Siders in Los Angeles!
Diana has an exciting prospect for Nate.
Nate must decide whether to cross moral lines.
Dan decides to reveal his book to his friends and family.
Serena must choose her job or her relationship with Dan.
Blair auditions her potential bridesmaids.
It's masks and more at theatre experience "Sleep No More".
Serena plans a dream bridal shower for Blair.
Nate takes on a new role at the Spectator.
Lily officially introduces Charlie to New York society.
Blair reveals to Serena what happened after the car crash.
Blair's bachelorette party!
Will the royal wedding be a disaster?
Blair must make a difficult decision about her future.
Nate throws a Valentine's Day party.
Dan's book is showcased by Upright Citizen's Brigade.
Blair thinks Cyrus may have found a potential loophole in her prenup.
Serena tries to make Lola the next It Girl.
Blair and Dan host a glamorous British-themed Salon.
Nate digs into Diana's past.
Chuck, Nate, Blair, Serena and Lola team up.
Serena poses as Blair at an important meeting.
In the season finale, Blair chooses between Chuck and Dan.
