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Taking a deep dive into serial killers' depraved psyches to reveal their darkest secrets.
  • The I-40 Killer
    Episode 143 mins
    A killer is murdering and mutilating young women along the Route 40 corridor in Delaware.
  • The I-95 Killer
    Episode 243 mins
    Police seek help finding a dangerous drifter after multiple men are brutally murdered.
  • The Charmer
    Episode 343 mins
    After women are murdered, police suspect the killer is able to charm his victims into submission.
  • The Englewood Killer
    Episode 443 mins
    Female murder victims are discovered in abandoned buildings barefoot.
  • Classified to Kill
    Episode 543 mins
    Detectives believe that a serial killer is using classified ads to lure and murder his victims.
  • The Interstate Killer
    Episode 643 mins
    A killer crisscrossing the Midwest and leaving a string of victims suddenly changes his mark.
  • The Grim Sleeper
    Episode 743 mins
    A cold-blooded killer conceals his victims' bodies with trash in the back alleyways of Los Angeles.
  • The Tourniquet Killer
    Episode 843 mins
    A killer taunts the media and authorities as he uses homemade ligatures to murder his victims.
  • Deaths in the Desert
    Episode 943 mins
    El Paso investigators race to track down a killer who buries his victims in shallow desert graves.
  • Summer of Fear
    Episode 1085 mins
    Two serial killers compete for the media's attention and the bodies pile up.
  • The Monster
    Episode 1143 mins
    Louisiana investigators hunt for a serial murderer who carves up the bodies of his victims.
  • The Bayou Strangler
    Episode 1243 mins
    A task force is formed when multiple bodies are dumped around Louisiana's bayou area.
  • The Skull Crusher
    Episode 1343 mins
    A killer in Hartford, Conn. is known for leaving a devastating mark that leaves his victims nearly unrecognizable.
  • The DC Sniper
    Episode 1443 mins
    A serial sniper terrorizes the entire DC metro area by discreetly targeting random victims.

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