Chuck, in the middle of his mission bumps into an old flame who dumped him and broke his heart. In the new episode of "Chuck", Chuck's ex-girlfriend Jill appeared while he was on a Nerd Herd call. In an attempt to save face, he lies to the girl and tells her that he is more successful than he really is.
When Chuck flashes on Jill's boss, a research scientist who may have developed a deadly bio-weapon, he, Sarah and Casey must find out if Jill is involved. Meanwhile at the Buy More, Big Mike nearly chokes to death, which leads company efficiency expert Emmett to implement a mandatory CPR course taught by Captain Awesome.
Jordana Brewster ("As the World Turns") and Tony Hale ("Arrested Development") guest star as Jill and Emmett respectively. The episode which is called "Chuck Versus the Ex" will be aired in two weeks time, on November 10.