James Cromwell, who plays Jack Bauer's father Phillip, had a role as President J. Robert Fowler in thriller The Sum of All Fears (2002), which also deals with nuclear weapons. Coincidentally, the main protagonist's name in the same film is also Jack, this time as Jack Ryan.
James Cromwell had a leading role in L.A. Confidential (1997) as Captain Dudley Smith, and Kiefer Sutherland played Jack Vincennes (Kevin Spacey's role in the film) in the TV pilot L.A. Confidential (2003). Though the pilot was never picked up to series, it is included as a bonus feature on the film's Special Edition DVD and Blu-ray releases.