Question: Who is the director of the 1996 American science fiction Western film in which the actress who played Kelly Gaines on "Cheers" stars?

Context paragraphs:
Westworld (TV series): Westworld is an American science fiction western thriller television series created by Jonathan Nolan and Lisa Joy for HBO.  It is based on the 1973 film of the same name, which was written and directed by American novelist Michael Crichton, and to a lesser extent on the 1976 sequel "Futureworld".  It is the second TV series based on the two films, the first being the short-lived 1980 series "Beyond Westworld".  Nolan and Joy serve as executive producers along with J. J. Abrams, Jerry Weintraub, and Bryan Burk, with Nolan directing the pilot.  The first season premiered on October 2, 2016, concluded on December 4, 2016, and consisted of ten episodes.  In November 2016, HBO renewed the show for a ten-episode second season, planned for a debut in early 2018.

Westworld (film): Westworld is a 1973 American science fiction Western thriller film written and directed by novelist Michael Crichton about amusement park androids that malfunction and begin killing visitors.  It stars Yul Brynner as an android in a futuristic Western-themed amusement park, and Richard Benjamin and James Brolin as guests of the park.

Jackie Swanson: Jackie Swanson (born June 25, 1963) is an American actress.  She is best known for her role on the American sitcom "Cheers" as Kelly Gaines, the rich and simple love interest of Woody Boyd.

Cowboys &amp; Aliens: Cowboys & Aliens is a 2011 American science fiction Western film directed by Jon Favreau and starring Daniel Craig, Harrison Ford, and Olivia Wilde.  The film is based on the 2006 graphic novel of the same name created by Scott Mitchell Rosenberg.  The plot revolves around an amnesiac outlaw (Craig), a wealthy cattleman (Ford), and a mysterious traveler (Wilde) who must ally to save a group of townspeople abducted by aliens.  The screenplay was written by Roberto Orci, Alex Kurtzman, Damon Lindelof, Mark Fergus and Hawk Ostby, based on a screen story by the latter two along with Steve Oedekerk.  The film was produced by Brian Grazer, Ron Howard, Kurtzman, Orci and Rosenberg, with Steven Spielberg and Favreau serving as executive producers.

List of Westworld characters: The characters from the American science fiction western thriller television series "Westworld", based on the 1973 film of the same name.  Takes place in the fictional Westworld, a technologically advanced, Western-themed amusement park populated completely by synthetic androids.

Science fiction Western: A science fiction Western is a subgenre of science fiction in a Western setting.

Skirmish on a Summer Morning: Skirmish on a Summer Morning is a 1976 Science fiction Western Novelette by Bob Shaw, combining the elements of Science Fiction (specifically, time travel) and Western.

Back to the Future Part III: Back to the Future Part III is a 1990 American Science fiction Western comedy film and the third and final installment of the "Back to the Future" trilogy.  The film was directed by Robert Zemeckis, and stars Michael J. Fox, Christopher Lloyd, Mary Steenburgen, Thomas F. Wilson and Lea Thompson.  The film continues immediately following "Back to the Future Part II" (1989); while stranded in 1955 during his time travel adventures, Marty McFly (Fox) discovers that his friend Dr. Emmett "Doc" Brown, trapped in 1885, was killed by Biff Tannen's great-grandfather Buford.  Marty decides to travel to 1885 to rescue Doc.

Defiance (TV series): Defiance is an American science fiction western drama television series developed by Rockne S. O'Bannon, Kevin Murphy, and Michael Taylor.  The series is produced by Universal Cable Productions, in transmedia collaboration with Trion Worlds who have released an MMORPG video game of the same name that is tied into the series world and mythology.

Oblivion 2: Backlash: Oblivion 2: Backlash is a 1996 American science fiction Western film directed by Sam Irvin, written by Peter David and starring Richard Joseph Paul, Jackie Swanson, Maxwell Caulfield and Musetta Vander.  It was produced by Full Moon Entertainment and was shot in Romania.  It is a sequel to the 1994 film "Oblivion".

Supporting paragraphs: Oblivion 2: Backlash Jackie Swanson
Answer: Sam Irvin