9-1-1

On one of the hottest days of the year, the first responders feel the pressure with harrowing incidents.

A massive earthquake rocks Los Angeles; Athena must deal with wreckage from a collapsed freeway overpass; Maddie faces her first crisis as a 911 dispatcher.

The first responders continue to deal with the fallout of a massive earthquake and its deadly aftershocks.

The first responders race to rescue victims trapped in various tight spots; Athena contemplates accepting a promotion.

Maddie goes on a ride-along with Athena, while dealing with a seemingly "perfect" dispatcher; Hen must figure out how to save her family.

Athena enlists the 118's help when a teenager speeds out of control on the freeway; A routine traffic stop uncovers a shocking kidnapping; Buck struggles with his recovery.

A massive tsunami hits the Santa Monica Pier, placing Buck and Christopher's lives in danger.

Athena, Maddie, Bobby, and the 118 race to save lives after a massive tsunami hits the Santa Monica Pier; Buck fears the worst when Christopher goes missing.

The first responders race to save workers in a high-rise during a fire drill and a mother and her sons involved in a perilous car accident; Maddie decides to take action against a possible wife abuser.

Athena takes action after her family experiences a traumatic traffic stop; Buck's suit against the city goes to arbitration; Eddie turns to Lena in his struggles with his anger issues.