Chuck (2007)

When an ordinary computer geek accidentally downloads a database of government secrets into his brain, he is forced into a dangerous double life as a vital intelligence asset protected by two elite handlers. Having become the most important asset of the U.S. government, Chuck is under the constant surveillance of agents Sarah Walker and John Casey, who remind him that he cannot reveal his spy life to his sister Ellie, nor his best friend Morgan. Balancing high-stakes spy operations with his mundane job at the Buy More, Chuck must protect his unsuspecting family and civilian relationships while navigating a complicated, blurring cover romance with Sarah.