High Quality Content by WIKIPEDIA articles! "Chuck Versus the Masquerade" is the sixteenth episode of the fourth season of Chuck. Although taking place on and around Valentine`s Day, the episode actually aired originally on February 21, 2011, one week later. Valentine`s Day is ruined when the team is dispatched to protect heiress Vivian McArthur (Lauren Cohan). John Casey is tempted by an offer from National Clandestine Service Director Jane Bentley (Robin Givens), and Morgan Grimes makes a big decision.