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.

Maddie goes on a ride-along with Athena; Hen must figure out how to save her family from permanently falling apart; The first responders deal with emergencies both at a military funeral and a movie theater.

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

The first responders race to the rescue of a crashed news copter, and emergencies at an eating contest, a bodybuilding competition and a toddler pageant.

Halloween finds the first responders racing to the rescue at a cemetery, a haunted hayride and a spooky Hollywood parade; Maddie thinks she has received a ghost call from a missing hiker.

Buck jumps back into the dating scene; Emergencies involve a woman going to great extremes to get her husband's attention; A couple are involved in a car accident on their wedding day.

Hen relives her evolution into the firefighter she is today as she recalls the first times she met Chimney and Athena.

The first responders face personal and professional challenges.

Bobby meets Athena's parents; Maddie's husband insinuates himself deeper into Chimney's life; A tanker carrying a tiger shark crashes on the freeway; A gas leak in a plastic surgeon's office happens mid-surgery.

Chimney relives his evolution as a firefighter, looking back at how he joined Station 118 and became the firefighter and paramedic he is today.

The first responders rally together to search for a missing Maddie.

The call center must turn to old school tactics after being hit with a massive system-wide power outage; The first responders deal with explosions in multiple homes and a difficult child birth.

A going-away party for a bank manager turns into an emergency, and then a mystery, as the first responders are accused of pulling off a daring heist.

After his devastating family tragedy in Minnesota, Bobby moves to LA, where he becomes Captain of the 118, and meets Athena for the first time.

Explores the high-pressure experiences of police, paramedics and firefighters who are thrust into the most frightening, shocking and heart-stopping situations. They must try to balance saving people with solving problems in their own lives. Written by ahmetkozan

Explores the high-pressure experiences of police, paramedics and firefighters who are thrust into the most frightening, shocking and heart-stopping situations. They must try to balance saving people with solving problems in their own lives. Written by ahmetkozan