Ice Cold: Levi King

E1

Levi King kills two Missouri residents in 2005, then travels to the Texas Panhandle to continue his murderous ways.

Mad Maks: Maksim Gelman

E2

Maksim Gelman discusses the four murders he committed in New York City in 2011.

Monster Inside: Robert Lopez

E3

A "push-button killer" who served time for stabbing a woman unleashes his hidden rage on a new girlfriend.

Twisted Love: Dena Riley

E4

A woman and her boyfriend, a convicted rapist, unleash their violent sexual fantasies upon two innocent victims.

Payback: Earl Forrest

E5

A Missouri man kills two people at a friend's home, then continues the bloodshed when authorities come looking for him.

Gene Meredith: Devil Inside

E6

Detectives in Great Falls, Mont., investigate the grisly stabbing death of a former corrections officer; the killer reveals his thoughts behind the crime.