Season 4

Muskogee officers battle to save an injured woman from her attacker; an undercover agent finds himself at the wrong end of the barrel; in California, an officer faces a knife-wielding teenage girl.

A hostage situation turns into a shootout; police try to stop a knife-wielding man enraged over a midnight pot roast, and officers fear for their lives when faced with an ambush from a hidden gunman.

In New York state, a domestic disturbance takes a violent turn; in Texas, police must break into an apartment to save the lives of two women as their machete-wielding attacker leads officers on a dangerous pursuit.

In Louisville, a heavily armed resident turns his sleepy suburb into a warzone; in Michigan, a home invasion takes a deadly turn when the suspect takes the homeowners and their child hostage.

In Texas, a local deputy attempts to rescue a woman trapped in her burning home; in Los Angeles, a plane crashes onto a railroad and in Nevada, an officer risks his life to save a suicidal woman.

In Florida, deputies respond to a domestic disturbance, but an uncooperative suspect leads to a dangerous stand-off; in Tennessee, an unlicensed driver steals a police cruiser, triggering a high-speed chase.

Body cam footage from law enforcement officers is combined with firsthand accounts to provide insight into the dangerous situations that officers encounter daily throughout the United States.

Body cam footage from law enforcement officers is combined with firsthand accounts to provide insight into the dangerous situations that officers encounter daily throughout the United States.