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?