Chuck Bartowski is finding out that living two separate lives is not going to come easy. After being challenged by his boss at Buy More, Chuck needs the help of his best friend Morgan and the Nerd Herd, to prove that he is up to the task and ready to become assistant manager. Meanwhile, Sarah and John force Chuck to go undercover for his first real spy mission. It seems that Chuck's two different lives are learning to Tango, but which one will learn to take the lead?
Spoilers ahead. Coverage follows the scope labeled below.
Complete story — includes the ending
Through the use of the Intersect now stored in his brain, Chuck discovers that an arms dealer known only as "La Ciudad," whose appearance is unknown, will be present at an art auction. Chuck is forced to infiltrate the party with Sarah to try and identify La Ciudad. While Casey and Sarah are preoccupied by MI6 agents, Chuck ends up dancing the tango with a seductive Latin woman, Malena ( Lorena Bernal ), who turns out to be La Ciudad.