Gossip Girl is winding down its fifth season and the year's third to last episode revolves around unlocking the secret in Diana Payne's little black (err, red) book.
This unites Nate, Chuck, Serena, Lola (can we stop trying to make her happen?) and Blair in a DaVinci-esque decoding storyline, which leaves Dan out in the cold. And none too pleased about it.
But the real moment to savor in this producer's preview comes at the end when writer Jake Coburn says the closing moment will "forever change the landscape of the show." A sentiment showrunner Josh Safran shares, adding, "This is probably the biggest surprise of the year."