In most murder cases, the 999 caller is a well-meaning citizen keen to alert police to a terrible crime, but sometimes the person on the line is the killer themselves. From the devious wife who rang emergency services to claim her husband had been burnt alive by masked raiders to the killer who pretended he had stumbled upon the body of one of his victims, each episode starts with the audio of a killer on the line. Using visually arresting graphics, the series reveals the terrifying backstory that leads to each call.

Duration 20 x 1 hr

WAG Entertainment for Channel 5, UK

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This documentary explores a killer’ s evil game of cat and mouse with detectives and a mother’ s relentless quest for justice. In 2011, Christopher Halliwell confessed to killing two women, even taking police to their burial sites. But Halliwell was not under caution when he made these admissions, and during police interviews, he refused to acknowledge what he’ d freely admitted earlier. With exclusive contributions from those closest to the case, the film follows the investigative team who faced an extraordinary dilemma as they navigated the mind of a monster and features new indepth interviews with Karen Edwards, the mother who would not accept that the man who once admitted killing her daughter could get away with murder.

Duration 2 x 1 hr

Story Films for Prime Video, UK

A dynamic, female-led documentary, The London Railway Killers tells the story of two childhood friends who grew into killers and the fierce group of women – police and victims – whose determination and resilience finally caged a monster. In 1996, a series of copycat attacks raised doubts about the imprisoned‘ Railway Killer’ – until a shocking confession revealed he hadn’ t acted alone.

Duration 2 x 1 hr

Story Films for Prime Video, UK

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In 1998, sex worker Samantha Class was brutally murdered. DNA evidence pointed to Gary Allen, but despite a high-profile trial, he was acquitted in 2000 and walks free. For nearly two decades, Allen continued his violent attacks, even confessing to an undercover officer, but the double jeopardy rule meant he couldn’ t be retried. It wasn’ t until a second murder in 2019, and a landmark change in the law, that justice finally caught up with him. This documentary reveals the devastating true story of two murders, an undercover sting, and the legal battle that reshaped Britain’ s justice system.

Duration 2 x 1½ hr

Firecrest Films for Prime Video, UK

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