Question: What American actor stars in the sixth installment in the "Saw" franchise?

full_context: Document 1: Saw (franchise): Saw is an American horror franchise distributed by Lionsgate, produced by Twisted Pictures and created by James Wan and Leigh Whannell, that consists of eight feature films and additional media. In 2003, Wan and Whannell made a short film to help pitch as a potential feature film. This was successfully done in 2004 with the release of the first installment at the Sundance Film Festival. It was released theatrically that October. The sequels were directed by Darren Lynn Bousman, David Hackl, and Kevin Greutert, and were written by Wan, Whannell, Bousman, Patrick Melton, and Marcus Dunstan, and were released subsequently every October, on the Friday before Halloween, between 2004 and 2010. Both of the creators remained with the franchise as executive producers. On July 22, 2010, producer Mark Burg confirmed that the seventh film, "Saw 3D", is the final installment of the series. Lionsgate reportedly expressed interest in continuing the franchise in 2012 with a reboot. However, in November 2013, it was reported that they were in active development of a sequel.
Document 2: Saw II: Saw II is a 2005 American horror film, a sequel to 2004's "Saw" and the second installment in the "Saw" franchise, directed and co-written by Darren Lynn Bousman and series creator Leigh Whannell. The film stars Donnie Wahlberg, Franky G, Glenn Plummer, Beverley Mitchell, Dina Meyer, Emmanuelle Vaugier, Erik Knudsen, Shawnee Smith, and Tobin Bell.
Document 3: Saw III: Saw III is a 2006 American horror film directed by Darren Lynn Bousman from a screenplay by Leigh Whannell and story by James Wan and Whannell. It is the third installment in the "Saw" franchise and stars Tobin Bell, Shawnee Smith, Angus Macfadyen, Bahar Soomekh, and Dina Meyer. "Saw III" marks the first appearances of Costas Mandylor and Betsy Russell, albeit minor roles; they would later become major characters in the series.
Document 4: Saw 3D: Saw 3D (also known as Saw: The Final Chapter, or simply Saw VII) is a 2010 American 3D horror film directed by Kevin Greutert, written by Patrick Melton and Marcus Dunstan, and starring Tobin Bell, Costas Mandylor, Betsy Russell, Sean Patrick Flanery and Cary Elwes. It is the seventh (and originally intended final) installment of the "Saw" franchise, and the only film in the series to be in 3D.
Document 5: Kevin Greutert: Kevin Greutert (born March 31, 1965) is an American film director, film editor and writer, best known for his work on the "Saw" film series, as well as character-based supernatural horrors. He is married to actress Elizabeth Rowin.
Document 6: Saw IV: Saw IV is a 2007 American-Canadian horror film and the fourth installment in the "Saw" franchise. It was directed by Darren Lynn Bousman and written by newcomers Marcus Dunstan, Patrick Melton, and Thomas Fenton. It stars Tobin Bell, Scott Patterson, Costas Mandylor, Betsy Russell, and Lyriq Bent.
Document 7: List of Saw characters: The "Saw" series of horror films features a large cast of characters created primarily by directors and screenwriters James Wan, Leigh Whannell, Darren Lynn Bousman, Patrick Melton, and Marcus Dunstan. The series focuses on the character of John Kramer (Tobin Bell), the "Jigsaw Killer", who seeks out those he considers to be wasting their lives and subjects them to torturous and lethal traps, referred to as "tests" and "games", in an attempt to make them appreciate living. The series comprises eight films: "Saw" (2004), "Saw II" (2005), "Saw III" (2006), "Saw IV" (2007), "Saw V" (2008), "Saw VI" (2009), "Saw 3D" (2010) and "Jigsaw" (2017).
Document 8: Saw (2004 film): Saw is a 2004 American horror film directed by James Wan. It is Wan's feature film directorial debut. The screenplay, written by Leigh Whannell, is based on a story by Wan and Whannell. The film stars Cary Elwes, Danny Glover, Monica Potter, Michael Emerson, Ken Leung, Tobin Bell and Leigh Whannell. In the film, Elwes and Whannell portray two men who awake to find themselves chained in a large dilapidated bathroom, with one being ordered to kill the other or his family will die. It is the first installment in the "Saw" franchise.
Document 9: List of Saw cast members: The list of "Saw" cast members is a list of actors who voiced or portrayed characters appearing in the "Saw" franchise created by James Wan and Leigh Whannell. The only actors to appear in all seven films are Tobin Bell (Jigsaw), who is also the only actor to film scenes for every film in the series, and Shawnee Smith (Amanda Young), who appears via archive footage in the three films she does not feature in prominently. Complementing them on screen are actors ranging from renowned status such as Danny Glover, Cary Elwes, and Donnie Wahlberg to lesser-known actors such as Dina Meyer and Lyriq Bent, among others. While many actors reprise their roles for cameos and minor appearances, the only actors besides Bell and Smith to appear with major roles in more than three films were Costas Mandylor (Mark Hoffman) and Betsy Russell (Jill Tuck), both of whom appear in the latter five instalments of the series.
Document 10: Jigsaw (Saw franchise): John Kramer—known as The Jigsaw Killer or simply Jigsaw—is a fictional character and appearing in the "Saw" franchise as the main antagonist. Jigsaw made his debut in the first film of the series, "Saw", and he later appeared in "Saw II", "Saw III", "Saw IV", "Saw V", "Saw VI", "Saw 3D" and, eventually, "Jigsaw". He is portrayed by American actor Tobin Bell.
Document 11: Jigsaw (2017 film): Jigsaw is an upcoming American horror film directed by Michael and Peter Spierig, written by Josh Stolberg and Peter Goldfinger, and starring Matt Passmore, Callum Keith Rennie, Clé Bennett, and Hannah Emily Anderson. It is the eighth installment in the "Saw" franchise, picking up over a decade after the death of the eponymous Jigsaw killer during the police investigation of a new succession of murders that fit his "modus operandi". "Saw 3D" was originally deemed the final installment of the series, before Lionsgate Films commissioned the production of "Jigsaw" from a pitch by Stolberg and Goldfinger. Filming began on November 2016, with post production following in January.
Document 12: Unabomber: The True Story: Unabomber: The True Story is a 1996 American television film starring Tobin Bell as Ted Kaczynski, who is also known as the Unabomber.
Document 13: Saw VI: Saw VI is a 2009 American horror film directed by Kevin Greutert from a screenplay written by Patrick Melton and Marcus Dunstan. It is the sixth installment in the "Saw" franchise and stars Tobin Bell, Costas Mandylor, Betsy Russell, Mark Rolston, Peter Outerbridge, and Shawnee Smith. It was produced by Mark Burg and Oren Koules of Twisted Pictures and distributed by Lionsgate.
Document 14: Bill Johnson (film and television actor): Bill Johnson (born December 16, 1951) is an American actor, known for his role as "Leatherface" in the 1986 horror film "The Texas Chainsaw Massacre 2".
Document 15: Tobin Bell: Tobin Bell (born Joseph Henry Tobin, Jr.; August 7, 1942) is an American actor. He is best known for his portrayal of John Kramer / Jigsaw of the "Saw" film series. After years of work doing stand-ins and background work on films, he got his first major acting job in "Mississippi Burning" (1988) and went on to star in made-for-television films and guest star in television shows throughout the 1990s.
ground_truth: Tobin Bell