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In The Vanishing Triangle, investigative journalist Lisa Wallace publishes an article about her mother's murder, which sparks the disappearance of Amy Reynolds. Alongside Detective David Burkely, the two work together to find Amy. Their investigation takes them around Ireland, as more girls go missing. As they follow every lead, some end up dead ends, but all the while, the killer plays psychological torture games with Lisa, putting her in compromising situations. As they get closer to finding the killer, David and Lisa learn more about the long-rooted corruption in the Gardaí system. To cover their tracks, high-ranking Gardaí members blackmail David with his own secrets. The investigative trail finally leads Lisa to the killer, where they face off again after all these years. In the end, she must confront her childhood trauma in order to save the missing girls.
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Network: Sundance Now

Allen Leech
as Detective David Burkely

India Mullen
as Lisa Wallace

Laoise Sweeney
as Susan Reynolds

Derbhle Crotty
as Barbara Abrahams

Stuart Dunne
as Chris Wallace

Aaron Monaghan
as Gareth Brennan

Adam John Richardson
as Tommy Stephens

Philip O'Sullivan
as Det. Chief Supt. Gill

Sarah Carroll
as Mary Burkely

Jana Moheiden
as Mandy Clarke
The Vanishing Triangle has 1 season totalling 0 episodes, and the series has concluded.
The main cast of The Vanishing Triangle includes Allen Leech (Detective David Burkely), India Mullen (Lisa Wallace), Laoise Sweeney (Susan Reynolds), Derbhle Crotty (Barbara Abrahams), Stuart Dunne (Chris Wallace).