Colm Meaney

Colm J. Meaney (; Irish: Colm Ó Maonaigh; born 30 May 1953) is an Irish actor widely known for playing Miles O'Brien in Star Trek: The Next Generation and Star Trek: Deep Space Nine. He is second only to Michael Dorn in most appearances in Star Trek episodes. He has guest-starred on many TV shows from Law & Order to The Simpsons, and currently stars as railroad magnate Thomas Durant on AMC's drama series Hell on Wheels.