E1 - Ice Cold: Levi King

Aired: April 11, 2013

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

E2 - Mad Maks: Maksim Gelman

Aired: April 18, 2013

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

E3 - Monster Inside: Robert Lopez

Aired: April 25, 2013

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

E4 - Twisted Love: Dena Riley

Aired: May 02, 2013

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

E5 - Payback: Earl Forrest

Aired: May 09, 2013

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

E6 - Gene Meredith: Devil Inside

Aired: April 01, 2014

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