In New York, a domestic disturbance takes a violent turn which changes a police chief's life; in Florida, an officer is separated from his K-9 while chasing two suspects; in Indiana, an officer stares down the barrel of a suspect's gun.

Arkansas police stop a knifeman enraged over a midnight pot roast; in Delray Beach, Fla., officers must rescue two children teetering on a ledge with their mother who is high on drugs; in Utah, a trespasser attacks an officer with his own baton.

Police pursue a father & son. An officer joins the chase and his life changes when he comes face to face with the armed suspects. In Ohio, a man threatens himself and his family. An officer negotiates over a video call, leading to a stand-off.

In Ohio a man shoots his ex. She flees and violence erupts when an officer finds him. In Utah police are called to a house where a mother and children have escaped a suspect armed with a machete. In California a therapist is attacked by a former patient.

In Texas, police set a trap for a would-be killer; a high-speed chase leads police into a Florida swamp, where a police dog locates the suspect who now needs to be rescued.

Arkansas officers are pinned down by a deadly gunman for four hours; after a high-speed chase of a stolen pick-up, Oklahoma City officers fear an ambush when a suspect bails; a naked driver waving a gun leads Wisconsin police to a dangerous standoff.

Officers confront a knife-wielding suspect. In Florida, a man who flees into the woods is outsmarted by a K9 Officer. In Indiana, a gunman wages war on police, caught on surveillance cameras, until SWAT closes in.

In California police face off against a knife-wielding bodybuilder; a wanted criminal draws an officer into a brawl in a sex shop, and a fleeing suspect drives a car directly at officers to escape.

A suspected drug dealer in Georgia won't go down without a fight; police in Ohio fear for their lives when faced with an ambush from a hidden gunman; after a high-speed chase, a fleeing driver has one more surprise for Macomb County Deputies.

An Arizona mother triggers a desperate search for her son, who is armed and suicidal; an Ohio officer fights for his life when a suspect overpowers him; a Wisconsin man shoots his co-workers and police must find him to stop the threat.