YOM KIPPUR AT THE WALDORFS/ELIZABETH HURLEY GUEST STARS IN A MULTI-EPISODE ARC - In the midst of celebrating Yom Kippur with family and friends, Blair and Louis (guest star Hugo Becker) find themselves in a power struggle with Louis' family. Serena's boss (guest star Michael Michele) puts Serena in the awkward position of choosing between her new job and her relationship with Dan. Diana (Hurley) prepares to debut the New York Spectator, but an unfortunate last-minute surprise delays the launch and Diana expects Nate to do whatever it takes to save the day. Ed Westwick, Kaylee DeFer, Kelly Rutherford and Matthew Settle also star. Joe Lazarov directed the episode written by Peter Elkoff.