Context of Walk the line, Fox 2000 Pictures presents a Tree/Line film production and a Catfish production ; in association with Mars Media Beteiligungs GmbH & Co. Filmproduktion KG ; released by Twentieth Century Fox ; executive producers, John Carter Cash, Alan C. Blomquist ; producers, James Keach, Cathy Konrad ; screenwriters, Gill Dennis, James Mangold ; director, James Mangold, (DVD)