Chuck is cheating on Sarah (Yvonne Strahovski)… with her evil twin? Who is Chuck (Zachary Levi) calling his manservant? NBC’s spy-fi series, Chuck returns this coming Monday with an episode entitled “Chuck vs. the Balcony.” Check out the episode promo and a sneak peek below.

TV Spot: Chuck – “Chuck vs the Balcony” (Season Four, Episode Eleven)

Clip: Chuck – Sneak Peek at “Chuck vs the Balcony”

Watch Chuck on NBC when it returns Monday, January 17th at 8/7C.