Acting
- 2025Daredevil: Born AgainDevlin3 ep.
- 2024The Boy That Never WasDave Garrick3 ep.
- 2023Then You RunOrin8 ep.
- 2022Star Trek: Strange New WorldsDr. Roger Korby4 ep.
- 2022In From the ColdChauncey8 ep.
- 2013The BlacklistSkip Sutherland2 ep.
- 20126DegreesConor Martin18 ep.
- 2008SeachtMichael8 ep.
Guest appearances
- 2025Star Trek: Strange New WorldsDr. Roger Korby4 ep.
- 2025Daredevil: Born AgainDevlin3 ep.
- 2024The Boy That Never WasDave Garrick3 ep.
- 2020Chicago P.D.Shane Sullivan1 ep.
- 2020FBI: Most WantedScot Weitzen1 ep.
- 2019The BlacklistSkip Sutherland2 ep.
- 2019BullNathan Alexander1 ep.
- 2016VikingsEirik1 ep.
Also known as: Cillian O'Suilleabhain · Cillian Ó Súilleabháin