The Vanishing Triangle (TV) Cast
The cast of The Vanishing Triangle. Updated on June 23, 2025.
20 actors
India Mullen
as Lisa Wallace (6 episodes)

India Mullen plays Lisa Wallace, an investigative journalist in the show.

Allen Leech
as Detective David Burkely (6 episodes)

Allen Leech portrays Detective David Burkely.

Adam Richardson
as Tommy Stephens (6 episodes)

Adam Richardson features as Tommy Stephens.

Laoise Sweeney
as Susan Reynolds (6 episodes)

Laoise Sweeney takes on the role of Susan Reynolds.

Fionnuala Murphy
as Frances Reynolds (6 episodes)

Fionnuala Murphy appears as Frances Reynolds.

Sarah Carroll
as Mary Burkely (6 episodes)

Sarah Carroll plays Mary Burkely.

Philip O'Sullivan
as Det. Chief Supt. Gill (6 episodes)

Philip O'Sullivan is seen as Det. Chief Supt. Gill.

Stephen Hogan
as Gough (6 episodes)

Stephen Hogan portrays Gough.

Brian Moore
as Mark Bulger (6 episodes)

Brian Moore takes on the role of Mark Bulger.

Jana Mohieden
as Mandy Clarke (6 episodes)

Jana Mohieden appears as Mandy Clarke.

Carolyn Donnelly
as Sinead Clarke (6 episodes)

Carolyn Donnelly plays Sinead Clarke.

Gracen Daly
as Laura Doolan (6 episodes)

Gracen Daly is seen as Laura Doolan.

Maura Foley
as Janice Wallace (6 episodes)
Kiera Crawford
as Rachel Burke (6 episodes)
Fionnuala Gygax
as Roisin (6 episodes)
Emily Roddy
as Teresa Gannon (6 episodes)
Jason Daly
as Jimmy (6 episodes)
Clara Fitzgerald
as Siobhan Bulger (6 episodes)
Claire O'Donovan
as Nurse (6 episodes)
Peter Corboy
as Liam Benson (6 episodes)
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