A series of ransomware threats lead to an overabundance of emergencies for the 118. Athena must revisit her traumatic attack as the case goes to trial. Eddie suffers a health scare. Maddie's postpartum depression worsens.

The 118 springs into action when a city-wide blackout and a record heatwave causes mayhem in Los Angeles. Chimney confides in Hen about Maddie's condition and Athena's worst nightmare comes true.

As the citywide blackout continues to cause mayhem in Los Angeles, Athena races to save her family from a tragedy. Eddie must make a difficult choice about his future. Maddie makes a life-changing decision.

The 118 arrives on the scene after a truck crashes into a high school homecoming parade. Athena and Michael try to help Harry in the aftermath of his kidnapping. Bobby gives Chimney advice regarding Maddie.

The 118 face an awkward rescue call when a man over-exerts himself exercising, and race to an explosion at a retirement community. Hen and Eddie, as well as Buck and Ravi, have rocky starts to their new partnerships.

Responding to a fire at a prison, Bobby and the 118 find themselves trapped in a deadly riot.

Bobby and the 118 race to save lives after an explosion rocks the hospital where David is performing surgery. Michael makes a life-changing decision.

Bobby and the 118 race to the rescue when an abandoned oil well erupts and causes a massive sinkhole in downtown LA. Athena investigates a 30-year-old cold case involving a casino robbery.

The members of the 118 are called to a series of emergencies around Christmas Eve. Then, Eddie struggles with an emotional Christopher.

The 118 "speed" to the rescue to save a family whose pick-up truck has been rigged with a pipe bomb. Eddie has a rough transition into his new job, Buck makes an impulsive relationship decision.

Chimney is determined to find a missing Maddie amongst the chaos of St. Patrick's Day.

Athena investigates a robbery at a gas station that takes an unexpected turn when the would-be victim turns the tables on her assailant. The 118 race to rescue a novice diver in a shark cage. Eddie reaches his breaking point.

The members of the 118 race into action when a women falls over her penthouse balcony.

The 118 races to an influencer in a sauna and an emergency at a reality show wedding. Maddie worries she has missed many Jee-Yun's firsts, May questions Athena's career and Hen and Karen try to recapture the fun in their relationship

The 9-1-1 Call Center goes up in flames: Bobby risks his life to save May and Claudette, Buck and Eddie work together to help an injured electrician and Chimney and his brother team up as firefighters for the first time.

After a mysterious death, Hen and Chimney put their lives in danger when they suspect that someone is playing God to make themselves look like a hero. Eddie visits Texas, where he attempts to reconcile with his father.

The 118 race to rescue a cliffside wellness retreat guru and respond to an emergency call at an upscale hair salon. Maddie contemplates returning to work. Eddie and May make decisions on their future.