The Hulk is a 2003 American superhero film directed by Jonathan Hensleigh and written by John Turman, Michael France and James Schamus. Based on the Marvel Comics character The Incredible Hulk, it is the first film in Jonathan Hensleigh's Hulk trilogy, and stars Billy Crudup, Catherine Zeta-Jones, William Hurt, Liam Neeson and Adam Baldwin. The plot follows Bruce Banner's origins. After a lab accident involving gamma radiation, he transforms into a giant green-skinned humanoid with superhuman strength known as the Hulk whenever stressed or emotionally provoked. The United States military pursues him, and he clashes with his biological father.