Nightwatch Nation

In Texas, responders run point in a massive multiple car collision. A combative addict offers tough challenges in New York, while in Louisiana, southern charm has its own healing effects.

In Baton Rouge, Lacey and Stacey restrain a patient suffering from violent hallucinations after overdosing; in Yonkers, NY, Alex and Jamal must determine what drug caused a woman to go unresponsive.

Alex and Jamal face unexpected challenges. Steven and Sam are called to a structure fire. Things get personal for Niki when a call for a patient with back pain takes an emotional turn.

In Austin, Luddy and Finch respond to a heroin overdose. Niki and Nicole show their compassionate side to a young woman. Yonkers medic Alex reveals a sobering truth about her past.

A man is shot by someone he trusts. Meanwhile, Cunningham and Ariel face an emotional call. And, Niki and Nicole are faced with the task of trying to save a life of a fellow service member.

A brawl erupts in the back of an ambulance. Meanwhile, Ariel and Cunningham rush to the scene of a flaming motorcycle wreck. And, Kim and Audrey hope to find a missing driver.

Baton Rouge paramedics rush to the aid of a man attacked by his girlfriend. Gunshots fired send Ariel and Cunningham to save a man. And, first responders plead with a patient to go the hospital.

A heatwave in the South makes a man pass out from heat exhaustion and needs intervention. Meanwhile, in Yonkers, Patrick prepares to deliver a baby in the back of the ambulance.

Brandon and Coop race to save a man's life after he's been struck by a bullet in the chest; Austin medics Luddy and Finch encounter the drunkest patient they've ever treated.

Patrick and Danelle help a schizophrenic patient; Holly and Chris have a scary run-in with poison control involving a nervous mother; Baton Rouge, La., has a night filled with erratic patients.