Chuck (2007)

S1E12 Chuck Versus the Undercover Lover

The story opens with a flashback set in 2004, showing John Casey in a relationship with a Russian woman named Ilsa, who presents herself as a photojournalist. Fast forward to the present, and Ilsa reappears, this time accompanied by her fiancé, Victor Federov. However, the situation takes a turn when it becomes clear that Ilsa is actually a French spy, complicating everything for Casey.