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
Law & Order
The Simpsons
Remarkably Bright Creatures
Law & Order: Criminal Intent
Star Trek: The Next Generation
MacGyver
Star Trek: Deep Space Nine
It's Always Sunny in Philadelphia
Stargate Atlantis
Dr. Quinn, Medicine Woman
The Unit
Hell on Wheels
Moonlighting
Tales from the Darkside
Gargoyles
Gangs of London
The Serpent Queen
Men in Trees
Con Air
Mercy
Law Abiding Citizen
Die Hard 2
Brooklyn Bridge
Strangers
Under Siege
Childhood's End
No Way Up
The Last of the Mohicans
Scarlett
The Late Late Show