Stephen Lang

American actor who began his career in Broadway theater, but today he is best known as the actor who played Colonel Miles Quaritch in James Cameron's film Avatar and Ike Clanton in the film Tombstone. His most recent notable roles include Commander Nathaniel Taylor in the television series Terra Nova (2011). Lang was the artistic director (along with Carlin Glynn and Lee Grant) of the famous Actors Studio at its New York headquarters from 2004 to 2006.