If you’re running out of cases to solve in the current streaming-sphere and have devoured modern classics from Line of Duty to The Missing, we’ve delved back through the archives and secured your next binge-watch. The phenomenal crime drama The Vanishing Triangle follows a journalist determined to expose a serial killer – think The Fall, with the media frenzy of Broadchurch.
The dark thriller, inspired by true events, takes us to 1990s Ireland where investigative reporter Lisa Wallace (India Mullen) publishes a deeply personal story about her mother’s unresolved murder, which triggers mass attention. When a woman vanishes shortly afterwards, Lisa is convinced the cases are connected and joins forces with detective David Burkely (Allen Leech). But can they stop the murderer before it’s too late?
Intrigued? With the series available to watch now, here’s everything you need to know about The Vanishing Triangle, including the plot, cast and how to watch it.
What is The Vanishing Triangle about?
Also known as The Vanishings, the six-part series, which premiered in Ireland in 2024, takes us to Dublin in the 1990s, and it’s inspired by a string of real-life disappearances at the time – although its plotline is fictional. The series follows brave journalist Lisa Wallace (India Mullen) who writes an article about her mother’s unsolved murder, which she witnessed as a child. The story sparks a new wave of interest in the case, and soon another young woman, Amy Reynolds (Gráinne Good) goes missing.
Lisa joins forces with Detective David Burkley (Allen Leech) to search for Amy, but their investigation grows quickly as more women disappear around Ireland, they’re certain they’re all linked to the same culprit. With every dead end and twisted game, the search gets more desperate, Lisa risks her own life as the killer targets her with psychological warfare, meanwhile David is blackmailed by a high-ranking detective as he threatens to expose corruption in the Gardaí (the Irish police force).
Who’s in the cast of The Vanishing Triangle?
The cast of The Vanishing Triangle includes:
- India Mullen (Normal People, Brassic) as Lisa Wallace
- Allen Leech (Downton Abbey, Bohemian Rhapsody) as Gareth Brennan
- Aaron Monaghan (Hidden Assets) as Gareth Brennan
- Laoise Sweeney (Art Detectives) as Susan Reynolds
- Derbhle Crotty (Mandrake) as Barbara Adams
- Philip O'Sullivan (God’s Creatures) as DCS Gill
- Gráinne Good (Citadel) as Amy Reynolds
- Bryan Moore (The Sleep Experiment) as Mark Bulger
- Jana Mohieden (Dark Lies the Island) as Mandy Clarke
- Adam John Richardson (Vikings: Valhalla) as Tommy Stephens
- Stuart Dunne (Fair City) as Chris Wallace
- Stephen Hogan (Kingdom of Dust) as Ger Gough
Is The Vanishing Triangle any good?
Yes – while it’s a harrowing watch, India Mullen delivers a compelling and emotional performance as the tenacious young reporter who will stop at nothing to save the victims. There are clear parallels to The Fall, when Stella Gibson (Gillian Anderson) hunts a serial killer operating in Belfast, and this is no coincidence since both dramas share the same executive producer. The media frenzy and community secrets echoes ITV’s Broadchurch, too. Add in red herrings, a suspenseful cat-and-mouse game and an unexpected ending – it’s impossible not to race through all six episodes.
Is there a trailer for The Vanishing Triangle?
Yes – you can watch the full trailer for The Vanishing Triangle below.
How can I watch The Vanishing Triangle?
All episodes of The Vanishing Triangle are available to watch now on Acorn TV via Prime Video.
What other crime dramas can I watch now?
For another Irish crime drama, we’d recommend Jack Taylor, which follows the eponymous detective, a self-destructive, heavy-drinking former Garda who becomes a private investigator in Galway – taking on the cases that others daren’t touch. Jack Taylor is available to watch now on ITVX. For an even more moving crime drama, we’d suggest Common, which tells the story of a vulnerable teenager Johnjo (Nico Mirallegro), who unwittingly gets caught up in a murder case after a fatal stabbing. You can watch Common now on the BBC.
