Season 4 (2013)

Profile of the 1970s armed robber and kidnapper.

In California in 1970, a doctor and his young family were executed and dumped in the swimming pool of their hilltop home. The killer believed that he was on a mission from God.

Featuring the killing of walkers in Yosemite National Park

Patrick Mackay is a British serial killer who confessed to murdering eleven people in the mid 1970s and considered by police to be a suspect in at least a dozen other killings over the previous two years.

Featuring a crime spree in Richmond, Virginia in 1979.

Profile of American serial killer H Clark.