Four Tom Clancy novels have been made into movies: "The Hunt for Red October," "Patriot Games," "Clear and Present Danger" and "The Sum of All Fears." All of these films focus on the character Jack Ryan, a CIA agent.
Alec Baldwin plays Ryan in "The Hunt for Red October," a 1990 movie adaptation of Clancy's first novel, which was published in 1984 and takes place during the Cold War. Harrison Ford plays Ryan in both 1992's "Patriot Games" and 1994's "Clear and Present Danger." "Patriot Games" focuses on Irish Republican Army hostage and assassination plots, and "Clear and Present Danger" deals with threats from Colombian drug cartels. Ben Affleck took over the role of Ryan in 2002's "The Sum of All Fears," which centers on an international arms dealing plot.
Ryan also appears as the main character in 2014's "Jack Ryan: Shadow Recruit," although this film is not based on a specific Clancy novel. The screenwriters wrote an original plot for the movie based on Clancy's characters. Chris Pine stars as Ryan. The 1999 made-for-television movie "NetForce" is also based not on a single Clancy novel but on a series he created, "Tom Clancy's Net Force." This movie stars Scott Bakula as FBI agent Alex Michaels.