Chuck Versus the Ex

S2 E6: While on a Nerd Herd call, Chuck runs into his ex-girlfriend Jill (recurring guest star Jordana Brewster - "The Fast and the Furious") -- the girl who broke his heart. In an attempt to save face, he lies and tells her that he is more successful than he really is. But 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 the company efficiency expert, Emmett (recurring guest star Tony Hale), to implement a mandatory CPR course, taught by Captain Awesome.