Chuck: Season 1, Episode 12

1 - 12: Chuck Versus the Undercover Lover

Chuck discovers that many Russian arms dealers are secretly meeting in Los Angeles. One particular Russian woman, Ilsa Trinchina, (Ivana Milicevic), catches his attention, and he flashes on her as being Casey's ex-girlfriend. Chuck grows very intrigued and begins to pester Casey about their history. After learning this woman is set to marry one of the Russian arms dealers, Chuck insists that Casey fights for his woman. Meanwhile, Devon and Ellie reach a tough point in their relationship. Much of this episode contains references and parallels to Casablanca.