Chuck Bartowski recently recruited for a joint CIA/MI6 partnership and is thrown into the new world of spying. He has competition but unbeknownst to him, she's not a threat but a colleague. Will they be able to work together?

Chuck heads to Rome despite his strong feelings for Sarah but he can't wait for her anymore. Sarah tries to deny her feelings telling herself that she can't love him anymore and for a time it works...Will it be too late, does she have it in her to fight for him no matter what the consequences will be. Set around S3

Sarah meets a stranger after the worst day of her life, the day of her red test and for some reason is drawn to him. But their time is cut short, a fling never to be repeated. She is later sent to LA to work on a joint CIA/NSA project unaware that the events of her worst day might have a happy ending, but what is seen on the surface is not always pleasant.

Casey returns from searching for Volkoff leaving Sarah to tie up a few loose ends. She does not return. Will Chuck kick himself for quitting the spy life now that Sarah is missing. Will his dreams of a spy free life ever happen...My take on S4