The actor who plays Jack Ryan has changed over the years. Tom Clancy's most famous creation has been played by five different actors across movies and a TV series. The name Tom Clancy may conjure visions of console games for some, but spy film fans of a certain vintage know the author as one of the pre-eminent writers of espionage thrillers. Often praised for his devotion to accuracy in depicting military tactics and international subterfuge, the late Clancy is one of few authors who can go toe-to-toe with horror icon Stephen King in terms of book sales.
