Colm Meaney
Colm J. Meaney (born May 30, 1953) is an Irish actor. He is widely known for playing Chief 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 other television shows, from Law & Order to The Simpsons, and has a significant career in motion pictures.
Filmography
The Simpsons
Law & Order
Law & Order: Criminal Intent
Star Trek: The Next Generation
Star Trek: Deep Space Nine
MacGyver
Stargate Atlantis
It's Always Sunny in Philadelphia
Moonlighting
Dr. Quinn, Medicine Woman
Gargoyles
Hell on Wheels
The Unit
Tales from the Darkside
Gangs of London
The Serpent Queen
Men in Trees
Mercy
The Late Late Show
Scarlett
Will
Strangers
Brooklyn Bridge
Die Hard 2
The Last of the Mohicans
Law Abiding Citizen
Con Air
Alice
Childhood's End
Dick Tracy