12. Black Tie

Liz wonders if she's actually on a date with Jack as she accompanies him to a birthday celebration for a foreign prince. While at the ball, Liz sees a different side to Jack as he unexpectedly runs in to his ex-wife. Back at 30 Rock, Tracy tempts Pete with a booze- and babe-filled party in the office, while Kenneth tries to keep Pete on the straight and narrow.