CHIN's

Eddie learns his divorce lawyer was never really a lawyer and that his multiple divorces were never really finalized. The crew chips in for the latest Pedalton bike for the station but all fall for the same trainer.

Monica receives a tip from an admirer worth a small fortune then goes out with the guy. A hypnosis tape intended to assist Chandler to stop smoking has a rather strange side effect. Phoebe is upset when her 18-year-old half-brother, Frank Jr., makes a surprise announcement that he is getting married – to a woman more than twice his age.

When Lucy's secret date with a Tacoma police officer ends in embarrassment, the firefighters and the local police struggle to manage the aftermath.

When Terry throws out his back, Eddie becomes the interim Chief, which creates tension over whose methods are best.

Terry is serious about his "No Station Birthday Parties" policy, but the Crew is set on ignoring it upon finding out it's Andy's 9th Leap Year birthday. Pulling it off might be mission impossible.

An upgrade at Station 24 brings Inferna, a new Artificial Intelligence system, intended to improve the station's efficiency and safety. While the crew enjoys the perks of a "smart" station, Eddie grows suspicious of Inferna's true agenda.