Season 1

When a Mother's Day killing horrifies a town, investigators discover the psychopath has struck before. Realizing that any woman could be his next victim, predicting the killer's next move hinges on understanding what motivates a monster.

As Washington D.C. burns, police realize they are hunting the most prolific serial arsonist in U.S. history, and he has been getting away with it for decades.

When a negotiator gets called to a hostage situation at a pharmacy in Alliance, NE, he must determine how to talk the gunman into laying down his weapons before people die.

A copycat Zodiac killer terrorizes New York City for years while keeping cops at bay. It falls to veteran NYPD detectives to outwit him.

Detectives track a predator who uses the great outdoors as both a hunting ground and a hiding place. The killer's knowledge of the wilderness gives him an advantage, forcing investigators to dig deep into his psyche and rely on their training.

When a beloved grandmother vanishes in the dead of winter in Wisconsin, and a ransom note is sent, a shocked detective discovers that he knows the kidnapper personally and that getting the victim back alive now hinges on his relationship with a maniac.