Who Am I? “Chuck vs. The Cliffhanger” Chuck Mondays, NBC, 8/7c PM Written by Chris Fedak & Nicholas Wootton Directed by Robert Duncan McNeill “Don’t freak out.” — Sarah When this show debuted in 2007, Chuck Bartowski was a nerd prince, with no ambition, a broken heart, and the skills of a 21st century computer ninja. Since then, he has become a reluctant spy, an enthusiastic spy, an A-list spy, and a renegade spy. Now, it seems, he is going to be a freelance spy. A happily married freelance spy. In an episode with “cliffhanger” in the title, producers Fedak…