Serena has gone missing; Chuck and Blair make a promise to each other about their relationship.
Episode rating
Cast of episode
57
18
11
8
3
1
- Chuck Bass
- Blair Waldorf
- Georgina Sparks
- Serena van der Woodsen
- Dan Humphrey
- Nate Archibald
- Ivy Dickens
- Rufus Humphrey
- Lily van der Woodsen
- Gossip Girl
- Sage Spence
- Bart Bass
- Amira Abbar
- Steven Spence
- Jean-Pierre
- Vanya
- Housekeeper
- Female Train Passenger
- Groom #1
- Natasha Spence
- Parisian at Cafe Playing Checkers
- Chef
- Spectator Employee
- Charlie 'Lola' Rhodes
- Groom #2
- Wedding Guest
- Party Goer