In a humorous twist, Blair questions the lack of passion in her relationship with Marcus, while at the same time Chuck appears to have lost his "passion" for any woman other than Blair. Meanwhile, Nate struggles between his feelings for Vanessa and his more-complicated-by-the-day relationship with Catherine. Jenny risks losing her internship when Eleanor catches Jenny critiquing one of the Eleanor Waldorf designs. Whilst being stuck in a elevator due to the blackout, Dan and Serena talk about their relationship and come to the conclusion that they are totally two different people and that it won't work out for the two.
Title comes from the 2008 film The Dark Knight.