Séaghan Ó Súilleabháin is known for Tg4 Bloc (2018), Siar Linn (2024) and Téacs Taistil (2023).

Lyra, Séaghan Ó Súilleabháin, and Kevin McGahern in Episode #1.2 (2025)

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"The Gentlemen" and "Slow Horses" return this fall, while the "Reacher" spin-off series "Neagley" makes its debut. See our guide of the biggest Fall TV and streaming releases.

2026 Fall TV and Streaming Watch Guide

&quot;The Gentlemen&quot; and &quot;Slow Horses&quot; return this fall, while the &quot;Reacher&quot; spin-off series &quot;Neagley&quot; makes its debut. See our guide of the biggest Fall TV and streaming releases.

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Séaghan Ó Súilleabháin and Faith-Leigh Chioma Bomah in Mo Pheata (2024)

Séaghan Ó Súilleabháin

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