Chuck Versus the Ex

At a BioScience conference, Chuck runs into Jill, his ex-girlfriend who broke up with him and later dated Bryce Larkin. He flashes on her boss, Guy Lafleur, who is suspected to be working on biochemical weapons. Chuck is ordered to reconnect with Jill in order to gain more information on Lafleur. Meanwhile, Emmett wants the staff to take CPR lessons including a test.