4 episodes
UK: The Lonely Hearts Killer Strikes
February 24, 2021 · 16m
UK: Inside the Lonely Hearts Killer's Pursuit
March 10, 2021 · 15m
UK: Parsing Clues in Lonely Hearts Murders
March 24, 2021 · 16m
UK: Motive Unraveled in Lonely Hearts Crimes
April 7, 2021 · 12m