Question: Tom Gallop played the role of Tom Cronin in a film series based on a character created by what author?

Context paragraphs:
Byomkesh Bakshi (TV series): Byomkesh Bakshi is the first Hindi Television series based on the Byomkesh Bakshi character created by Sharadindu Bandyopadhyay.  The series stars Rajit Kapur and K.K. Raina as Byomkesh Bakshi and Ajit Kumar Banerji respectively.  It became critically acclaimed and most celebrated adaptation of the character keeping it fresh even after decades.

Tom Brown (character): Tom Brown is a fictional character created by author Thomas Hughes in his work "Tom Brown's School Days" (1857) which is set at a real English public school — Rugby School for Boys — in the 1830s when Hughes himself had been a pupil there.  Tom Brown is based on the author's brother, George Hughes, and George Arthur is based on Arthur Penrhyn Stanley.

Bourne (film series): The Bourne films are a series of action spy thriller films based on the character Jason Bourne (Matt Damon), a CIA assassin suffering from extreme memory loss who must figure out who he is, created by author Robert Ludlum.

Grace, Replaced: "Grace, Replaced" is the eighteenth episode of the first season of the American television series "Will & Grace".  It was written by Katie Palmer and directed by series producer James Burrows.  The episode originally aired on the National Broadcasting Company (NBC) in the United States on April 8, 1999.  Actors Molly Shannon, Leigh-Allyn Baker, and Tom Gallop guest starred on "Grace, Replaced".

Human Target (2010 TV series): Human Target is an American action drama television series that was broadcast by Fox in the United States.  Based loosely on the "Human Target" comic book character created by Len Wein and Carmine Infantino for DC Comics, it is the second series based on this title developed for television, the first TV series having been aired in 1992 on ABC.  Developed by Jonathan E. Steinberg, "Human Target" premiered on CTV in Canada and on Fox in the United States in January 2010.  The series was officially canceled on May 10, 2011, after the conclusion of the second season.

Anya Jenkins: Anyanka "Anya" Christina Emmanuella Jenkins is a fictional character created by Joss Whedon for the television series "Buffy the Vampire Slayer".  She also appears in the comic book series based on the television show.  Portrayed by Emma Caulfield, the character appears as a guest star in the third and fourth seasons of the show before becoming a series regular in the show's fifth, sixth, and seventh seasons.  The character made her last television appearance in 2003, appearing in the series finale of the show that aired on May 20, 2003.

Tom Swift: Tom Swift is the main character of five series of American juvenile science fiction and adventure novels that emphasize science, invention and technology.  First published in 1910, the series total more than 100 volumes.  The character was created by Edward Stratemeyer, the founder of the Stratemeyer Syndicate, a book-packaging firm.  Tom's adventures have been written by various ghostwriters, beginning with Howard Garis.  Most of the books are credited to the collective pseudonym "Victor Appleton".  The 33 volumes of the second series use the pseudonym Victor Appleton II for the author.  For this series, and some of the later series, the main character is "Tom Swift, Jr." New titles have been published as recently as 2007.  Most of the various series emphasized Tom's inventions.  The books generally describe the effects of science and technology as wholly beneficial, and the role of the inventor in society as admirable and heroic.

Disney Fairies: Disney Fairies is a Disney franchise created in 2005.  The franchise is built around the character of Tinker Bell from Walt Disney's 1953 animated film "Peter Pan", subsequently adopted as a mascot for the company.  In addition to the fictional fairy character created by J. M. Barrie, the franchise introduces many new characters, and expands substantially upon the limited information the author gave about the fairies and their home of Neverland.  The characters are referred to within stories as "Neverland fairies".  The franchise includes children's books and other merchandise, a web site, and the computer-animated "Tinker Bell" film series, featuring the character and several of the Disney fairies as supporting and recurring characters.

Tom Gallop: Tom Gallop is an American actor.  He is best known for his performance as Tom Cronin in Bourne.

Red Sonja (film): Red Sonja is a 1985 Dutch-American sword and sorcery action film directed by Richard Fleischer.  The film introduces Brigitte Nielsen as the title character with Arnold Schwarzenegger, Sandahl Bergman, Ronald Lacey, Ernie Reyes, Jr., Paul L. Smith and Pat Roach in supporting roles.  The film features the sword-wielding Marvel Comics character Red Sonja, created by Roy Thomas, who first appeared in Marvel's "Conan the Barbarian" series (#23) in 1973.  The film's character of Red Sonja was based on Red Sonya of Rogatino, a character created by Robert E. Howard appearing in his short story "The Shadow of the Vulture" (1934).  The film acknowledges that it was "based on the character created by Robert E. Howard" in the introductory credits.

Supporting paragraphs: Tom Gallop Bourne (film series)
Answer: Robert Ludlum