William Mapother
Mapother has become widely known as a character actor. He sometimes plays scary or otherwise dark characters. He played an important role in Todd Field's In the Bedroom. Mapother is more widely known as Ethan Rom in the TV show Lost. The character was killed early in the first season. Since then, however, he has appeared in seven episodes mainly through flashbacks, once due to time travel and another in an alternate timeline. In total, he appeared in eleven episodes of Lost.