Cox is a Scottish actor who portrayed Ward Abbot in The Bourne Identity and The Bourne Supremacy. He attended LAMDA where he studied acting and began working the the theatre. He later became involved in film work in the 80s and 90s, and became a well known actor very quickly. In 2002 he appeared in Adaptation alongside Chris Cooper, and in 2011 he starred in the BBC production The Sinking of the Laconia, alongside Franka Potente.