Bobby Joe Long: Journey inside the mind of Bobby Joe Long, a serial killer who murdered ten women in seven months.

Enslaved, chained women in the basement. A freezer full of dismembered body parts. The scene that greeted Philadelphia authorities in 1987 cemented Gary Heidnik as one of the most sadistic figures of the 20th century.

Archival footage and reenactment portrays events of serial killer duo Loren Herzog and Wesley Shermantine. The "Speed Freak Killers" (for their methamphetamine abuse) were convicted of four murders, and suspected of as many as 72.

Timothy Krajcir's five-year killing spree didn't come to light until twenty years after the fact, when DNA evidence set off a domino effect ultimately linking the onetime EMT to murders of nine women between 1977 and 1982.

One of four serial killers tormenting Louisiana in the late 1990s through the early 2000s, Sean Vincent Gillis saw women as a collection of parts--and set about turning them into just that.

Israel Keyes stands to be remembered as one of the most elusive and far-reaching serial killers in history--but only if law enforcement can piece together the labyrinth of hints, left before his 2012 suicide, to identify countless victims he claims to have killed over the previous fifteen years.