William Mapother
William Reibert Mapother Jr. (/ˈmeɪpɒθər/; born April 17, 1965) is an American actor, known for his role as Ethan Rom on the television series Lost and starring in the film In the Bedroom. He is also known for the film Another Earth. Description above from the Wikipedia article William Mapother, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Known for
Mission: Impossible II 
The Grudge 
I Origins 
Another Earth 
Lords of Dogtown 
In the Bedroom 
Suspect Zero 
The Atticus Institute 
Ask the Dust 
The Burrowers 
Without Limits 
Tell Me How I Die 
Citizen Gangster 
Moving McAllister 
Static 
A Warrior's Heart 
FDR: American Badass! 
Hurt 
Underdogs 
Escape from Polygamy 
Black Girl Missing 
Outlaw Posse 
On Sacred Ground 
The Leader