On December 29, 1962, twenty-three-year old Patricia Bissette was found strangled in her Boston apartment. She was second young victim, and the seventh overall attributed to The Boston Strangler. But there were some who weren't so sure Bissette was a victim of THE Strangler. There was legitimate suspicion that Bissette’s boss—a married man with a motive for keeping his affair with Bissette quiet—had killed her. In this episode, host Portland Helmich reveals how one significant detail, Bissette’s address, might have helped police find the real killer in 1962. We’ll hear more about the tragic consequences of this missed opportunity, and we’ll meet Adele Roof, who believes that she befriended the Boston Strangler in 1962—and almost became one of his victims.

Three months with no new deaths: investigators were beginning to believe that the Boston Strangler’s killing spree had ended. Then, on December 5, 1962, a roommate found the body of 20 year old Sophie Clark, and the case took a terrifying new turn. Had the killer changed his M.O.? Were two or more Boston Stranglers at large? Host Portland Helmich digs into the details surrounding Clark’s murder, and learns much more about the obsessive patterns serial killers usually follow. She also talks to Jane Caputi, an expert who studies the ways in which society turns some serial killers into outlaw heroes.

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Two more murders bring the total to five, terrorizing the city. As the police come up short in their attempt to protect the city, women take desperate measures to protect themselves. In this episode, host Portland Helmich meets a granddaughter of the Strangler’s fourth victim, and she follows the Boston police as they launch and attempt to control one of the largest manhunts the city had ever known. We’ll hear the voice of the late detective Phil DiNatale, meet his son, John, and explore the family’s vast archive of original Strangler notes, photos and diaries. Portland also interviews Mark Safarik, a retired FBI agent, who specializes in the homicides of elderly women. Safarik explains that with an unprecedented crime, traditional crime-solving techniques are almost never effective.

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In 1964, 19-year-old Mary Sullivan was strangled to death in her apartment, the 13th victim of a killing spree that had terrorized Boston for 18 months. Her death remained unsolved for nearly 50 years. The same is true for a dozen more deaths attributed to the Boston Strangler. In our first episode, we meet Mary, as well as the killer’s first victims, and begin to explore the many unanswered questions that continue to haunt the victims’ families, the police who worked on the case, and the reporters who turned it into a national story.