With the aftermath of a last emergency that 118 answered, the 118 and their families and friends find difficulties in moving on with their lives after losing and burying a lost friend.

Athena and Buck are in a race against time to rescue the rest of the 118 following the fire in the bio lab.

In part one of a two-part episode, the 118 is called to a research lab that has been set on fire and becomes a biohazard.

After the 118 responds to several calls from the same person, Hen steps in to offer them advice. Meanwhile, Eddie confronts his parents and takes a big step in his relationship with his son.

Maddie's return to work proves to be more triggering than expected, as she may have returned too soon. As Eddie struggles to adapt to his new surroundings, Christopher discovers him in an unfamiliar situation.

The 118 responds to a call at a mega-church, where Bobby runs into his estranged mother. Meanwhile, Buck is looking to expand his social circle now that Eddie has left.

Following Maddie's mysterious 9-1-1 call, Chimney returns home to find his daughter alone and Maddie nowhere to be found; he then enlists Athena and Romero to help investigate. 

The 118 responds to a fire at a local animal shelter and races to evacuate all the animals. Meanwhile, Maddie takes a 9-1-1 call that sets her on a quest for answers.

Things get messy for the 118 following a massive pipe explosion. Meanwhile, Athena investigates the brutal beating of a man found behind a grocery store, and Bobby's working relationship with Brad from "HOT SHOTS" just got a little more intimate.

When Athena is assigned a rookie to mentor, she begins to question her own abilities. Meanwhile, Bobby and the 118 return to the set of "HOT SHOTS" following a 911 call. 

When a toddler falls down a pipe and becomes trapped, the 118 must rely on more than their skills to rescue him. Meanwhile, old wounds are opened when members of the 118 race to the aid of a man dealing with a divorce.

The 118 is once again working on the spookiest night of the year and missing out on all the tricks and treats. Meanwhile, Buck's Halloween decorations become a little scarier than he had hoped.

When it finally looks like Hen and Karen may get their foster license back, they are hit with another obstacle. Meanwhile, the 118 races to the aid of a cheerleader involved in an infield collision. 

Athena's only chance of surviving and saving everyone on the flight is to attempt to land the plane before it crashes and call on the 118 for help.

Athena is tasked with safely delivering a prisoner to testify on a high-profile case. Meanwhile, a light plane is hit by a swarm of bees and sent careening into a passenger plane. 

The 118 team battles an "un-bee-lievable" emergency when a trailer with millions of bees crashes on the streets of Los Angeles, unleashing a swarm.