Amy attempts to quit smoking while Jake and Charles reluctantly team up with an investigator from the U.S. Postal Service to catch a drug dealer. Jake and Boyle are paired with the insipid Agent Danger (guest star Ed Helms) to work on finding the dealers responsible for distributing gigglepig and eventually get their bad guys when they decide they have to all work together. Amy realizes her constant desire to be perfect is what is hindering her from quitting smoking all together, after some words of encouragement from Capt. Holt.