The book was adapted as a feature film, which was released on May 31, 2002. Jack Ryan was played by Ben Affleck while John Clark was played by Liev Schreiber; additionally, CIA director Marcus Cabot, whose first name was changed into William, was played by Morgan Freeman. The film is a reboot that departs from all previous Ryan films, and as a result, there were significant changes from the book, such as the antagonists being neo-Nazis instead of Palestinian terrorists, Ryan becoming a low-level CIA analyst, and the time period changed to 2002. Clancy served as executive producer on the film, and regarding the changes from his book, jokingly introduced himself in the commentary track on the DVD release as “the author of the book that he Phil Alden Robinson, who is present with Clancy ignored”. Nevertheless, he complained about technical inaccuracies throughout the film in the commentary.