5x1 – Episode 1
A series of ransomware threats leads to an overabundance of emergencies for the 118, including a medevac helicopter crash at a hospital and an air-traffic control tower system failure. Meanwhile Athena must revisit her traumatic attack when the case of the realtor serial rapist goes to trial, Eddie suffers a health scare and Maddie's postpartum depression worsens.
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5x2 – Episode 2
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.
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5x3 – Episode 3
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.
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5x4 – Episode 4
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.
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5x5 – Episode 5
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.
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5x6 – Episode 6
Responding to a fire at a prison, Bobby and the 118 find themselves trapped in a deadly riot.
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5x7 – Episode 7
The 118 race to rescue a man who claims he was carjacked, shot and buried alive. Hen receives a visit from the past. Athena and family are concerned that Harry is still haunted by visions of Jeffrey.
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5x8 – Episode 8
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.
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5x9 – Episode 9
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.
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5x10 – Episode 10
The members of the 118 are called to a series of emergencies around Christmas Eve. Then, Eddie struggles with an emotional Christopher.
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5x11 – Episode 11
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. The 118 welcome two new members to the team.
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