Stephen Lang. Actor: Avatar - Aufbruch nach Pandora. Stephen Lang is a distinguished and award-winning actor who commands considerable respect, and is equally at home on the Broadway stage, on television, and in film. Though he is arguably most well-known for his acclaimed performance in James Cameron's Avatar - Aufbruch nach Pandora (2009), Lang began his career in theater. Broadway roles include his Tony-nominated performance as Lou in "The Speed of...