TV series asks: What if someone had stopped JFK's killer?

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What If Someone Stopped Lee Harvey Oswald From Killing JFK?

What if the JFK assassination didn't happen and someone saved the president's life in 1963?

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That is the behind the new miniseries 11.22.63, based on the best-selling book by Stephen King.

James Franco plays a history teacher who goes back in time to stop Lee Harvey Oswald from killing John F. Kennedy.

At the show's Los Angeles premier, Franco called the series "a fresh take on the assassination. It's like 'What if? What if you could change history?'"

The series was filmed at the Dallas Book Depository where Oswald opened fire on the Kennedy motorcade. They also got permission to film in Dealey Plaza and on the infamous grassy knoll.

Photos of JFK throughout his lifetime:

26 PHOTOS
John F Kennedy (life)
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TV series asks: What if someone had stopped JFK's killer?
1927: Headshot portrait of John F Kennedy (1917-1963) at age ten, standing outdoors and wearing a suit with his hair slicked back. (Photo by Hulton Archive/Getty Images)
Future President of the United States of America, John F Kennedy (1917 - 1963) in London. (Photo by Evening Standard/Getty Images)
American statesman John F Kennedy, later the 35th President of the United States (right), with Mr Borhum at a garden party at the White House, Washington DC. (Photo by Fox Photos/Getty Images)
1st September 1939: Joe, Kathleen and John F Kennedy, the children of American Ambassador to Great Britain, Joseph P Kennedy, arriving at the Houses of Parliament in London. John later became the 35th President of the United States. (Photo by Fox Photos/Getty Images)
A photo dated 1950's shows John F. Kennedy with his wife Jacqueline Bouvier Kennedy. (Photo credit should read AFP/AFP/Getty Images)
John Fitzgerald Kennedy (1917 - 1963), the American president sitting in a rocking chair. (Photo by Keystone/Getty Images)
Senator John F Kennedy seeking the Democratic nomination for the presidential elections, which he went on to win. (Photo by Keystone/Getty Images)
President John F. Kennedy speaks on the telephone August 23, 1962 in the Oval Office. (Photo by National Archive/Newsmakers)
Senator John F Kennedy (1917 - 1963) is given a rousing ovation during his presidential campaign. (Photo by Keystone/Getty Images)
U.S. Senator John F. Kennedy, D-Mass., and his bride, the former Jacqueline Lee Bouvier, cut their wedding cake during a reception following thier marriage Sept.12, 1953 at Newport, R.I. (AP Photo)
John F Kennedy (1917 - 1963), American president-elect, with his wife Jacqueline (1929 - 1994) at the christening of their son John F Jr. (1960 - 1999) in Washington. (Photo by Keystone/Getty Images)
President John F. Kennedy speaks to the AFL-CIO convention on Dec. 7, 1961 in Bal Harbour, Florida, where he said employment hit a new record in the month of November, Kennedy addressed the labor convention after making a talk at the Young Democrats convention at Miami Beach, Florida. (AP Photo)
U.S. President John F. Kennedy (1917 - 1963) holds his first press conference, Washington D.C., 28th January 1961. (Photo by Central Press/Hulton Archive/Getty Images)
FILE - In this Aug. 7, 1960 file photo, Democratic presidential nominee Sen. John Kennedy and wife Jacqueline sit in their sailboat at Hyannis Port, Mass. The Kennedy image, the "mystique" that attracts tourists and historians alike, did not begin with his presidency and is in no danger of ending 50 years after his death. Its journey has been uneven, but resilient _ a young and still-evolving politician whose name was sanctified by his assassination, upended by discoveries of womanizing, hidden health problems and political intrigue, and forgiven in numerous polls that place JFK among the most beloved of former presidents.(AP Photo)
17th February 1961: Jacqueline Kennedy (1929 - 1994), wife of US President John F Kennedy, and daughter Caroline relax together at home. (Photo by Keystone/Getty Images)
1962: US statesman John F Kennedy, 35th president of the USA, making a speech. (Photo by Central Press/Getty Images)
US President John F Kennedy (1917 - 1963, left) with British Prime Minister Harold Macmillan (1894 - 1986) outside Government House in Hamilton, Bermuda, where they are holding talks, 22nd December 1961. (Photo by AFP/Getty Images)
President John F. Kennedy greets wellwishers after a speech May 8, 1963 at the White House. (Photo by National Archive/Newsmakers)
Little Caroline kisses her father John F. Kennedy, who is elected on November 9, 1960. Kennedy is not only the first Catholic in the White House, but also the youngest president in US history. (AP Photo) 1960
President John F. Kennedy smiles as he watches the annual Army-Navy game at Philadelphia Stadium, Dec. 2, 1961. He sat first on the Army side and then crossed over to the Navy side for the second half of the game, which Navy won, 13-7. (AP Photo)
Sen. John F. Kennedy, Democratic presidential candidate, and his wife, Jacqueline, pause to talk to crowd as they pass through the Wall Street area en route to City Hall in New York, Oct. 19, 1960. As Kennedy talked the crowd surged toward his car. At Mayor Wagner's suggestion, Sen. Kennedy spoke but briefly and motorcade proceeded up Broadway from City Hall. (AP Photo)
9th November 1960: Senator John F Kennedy, the Democratic candidate who has been elected president of the USA. (Photo by Keystone/Getty Images)
In this Nov. 13, 1963 file photo, U.S. President John F. Kennedy and first lady Jacqueline Kennedy sit with their children, John Jr. and Caroline, on a portico overlooking the White House South Lawn in Washington. In background is British Ambassador David Ormsby Gore. (AP Photo)
President John F. Kennedy is greeted by an enthusiastic crowd in front of the Hotel Texas in Fort Worth, Nov. 22, 1963. (AP Photo)
This Nov. 22, 1963 file photo shows President John F. Kennedy and his wife Jacqueline Kennedy upon their arrival at Dallas Airport, in Dallas, shortly before President Kennedy was assassinated. PBS says its fall schedule will include a variety of specials marking President John F. Kennedy's death 50 years ago. In the weeks leading up to the milestone anniversary of his Nov. 22, 1963, slaying in Dallas, PBS said it will air "JFK," a four-hour "American Experience" special. (AP Photo, file)
This Nov. 22, 1963 file photo shows President John F. Kennedy riding in motorcade with first lady Jacqueline Kenndy before he was shot in Dallas, Texas. (AP Photo, file)
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INSIDE EDITION asked Franco if he could go back in time and change one historical day, which would it be.

"If I would change anything, you'd think stop 9/11, of course. I'd want to stop that, but who's to say something worse wouldn't happen?"

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Star Wars: The Force Awakens director J.J. Abrams produced the show. "The story talks about this in a way, things don't happen the way you might think. You predict things all you want but the dominos don't fall like you'd think."

See photos of Jackie O and JFK together:

38 PHOTOS
John F Kennedy and Jackie O Wedding
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TV series asks: What if someone had stopped JFK's killer?
Sen. John F. Kennedy (D-MA) and his bride, the former Jacqueline Lee Bouvier, leave St. Mary's Catholic Church following their wedding in Newport, RI, September 12, 1953. Archbishop Richard J. Cushing of Boston officiated at the ceremony. (AP Photo)
Senator John F. Kennedy, D-Mass., is shown with his bride, the former Jacqueline Bouvier, leaving a Newport, RI church after their wedding on September 12, 1953. (AP Photo)
U.S. Senator John F. Kennedy, D-Mass., and his bride, the former Jacqueline Lee Bouvier, cut their wedding cake during a reception following thier marriage Sept.12, 1953 at Newport, R.I. (AP Photo)
Jacqueline Lee Bouvier and Senator John F. Kennedy (D-Mass.) will be married at a nuptial mass officiated by Abp. Richard J. Cushin of Boston in St. Mary's Church, Newport, R.I., September 12, 1953. Undated photo of Jacqueline Bouvier in her wedding gown. (AP Photo/Bradford Bachrach)
The engagement of Miss Jacqueline Lee Bouvier, 23, to U.S. Senator John F. Kennedy (D-Mass) has been announced by her mother and stepfather Mr.and Mrs. Hugh D. Auchincloss of Newport, R.I., June 25, 1953. Undated photo. Associated Press photo from Glogau. (AP Photo)
Sen. John F. Kennedy, D-Mass., and his fiancee, Jacqueline Bouvier, prepare a sailfish boat for sailing at Hyannis, Mass., June 27, 1953. (AP Photo)
Sen. John F. Kennedy, D-Mass., and his fiancee Jacqueline Bouvier, 23, pose on the lawn of the Kennedy residence during their weekend visit at Hyannis, Ma., on June 27, 1953. The couple announced their engagement June 23. (AP Photo)
U.S. Senator John F. Kennedy (D-Mass) and his fiancée Miss Jacqueline Bouvier, 23, smile happily as they prepare for a game of tennis at the Kennedy residence at Hyannis, Massachusetts on June 27, 1953, where they are spending the week-end. Miss Bouvier is from Newport, R.I., and McLean, W. Va. The couple's engagement was announced on Tuesday. (AP Photo)
Jacqueline Tortorice, second from right, of Los Angeles, Calif., leans forward Tuesday, May 27, 1997, at the John F. Kennedy Library and Museum in Boston as she examines the wedding gown worn by Jacqueline Bouvier for her marriage to John F. Kennedy, which took place in Newport, R.I., on Sept. 12, 1953. Included in the exhibit are the red woolen suit Mrs. Kennedy wore during her televised tour of the White House, as well as film footage and numorous historic objects pertaining to the Kennedy Administration. (AP Photo/Steven Senne)
First lady Jacqueline Kennedy raises a hand to her hair as she poses at the White House with officials of the American National Theater and Academy, March 12, 1963. From left to right: Mrs. Virginia Murray Bacon, president of the Washington chapter of ANTA; Ms. Peggy Wood, president of ANTA; Mrs. Kennedy; Stanley Young, Executive Committee of ANTA; and Mrs. Virginia Royall Inness-Brown, president, Greater New York chapter of ANTA. (AP Photo)
Massachusetts, USA, 1950's, President of the United States of America John F, Kennedy pictured as a young man with his wife Jackie Kennedy (Jacqueline Bouvier) early in their marriage (Photo by Popperfoto/Getty Images)
Massachusetts, USA, 1950's, President of the United States of America John F, Kennedy pictured as a young man with his wife Jackie Kennedy at home (Photo by Popperfoto/Getty Images)
NEWPORT, RI - SEPTEMBER 12: John F. Kennedy and Jacqueline Kennedy outside St. Mary's Church after their wedding on September 12, 1953. (Photo by Charles F. McCormick/The Boston Globe via Getty Images)
UNSPECIFIED - CIRCA 1754: US President John Kennedy, President Charles de Gaulle and Jackie Kennedy in Paris at the Elysee Palace May 31, 1961 (Photo by Universal History Archive/Getty Images)
1956: Waiter clearing dishes fr. table in front of actor David Niven (3R) sitting next to Sen. Jack Kennedy's wife Jackie (2R) w. others dining at society gala sponsored by wife of US Amb. to Cuba, in the ballroom of the Waldorf Astoria Hotel. At the far left is Jackie's sister Caroline Lee Bouvier (later Canfield, Radziwill, and Ross). (Photo by Yale Joel/The LIFE Picture Collection/Getty Images)
March 25, 1958: Sen. Jack Kennedy cuddling his darling baby daughter Caroline who is smiling as her mom Jackie looks on in delight while relaxing on bed at home. (Photo by Ed Clark/The LIFE Picture Collection/Getty Images)
JULY 20: John F. Kennedy and Jacqueline Kennedy. (Photo by Charles McCormick/The Boston Globe via Getty Images)
Sen. Jack Kennedy slyly lending an ear to his wife Jackie's giddy whisper as they sit together at table during cocktail hour before dining at society gala sponsored by wife of US Amb. to Cuba, at the Waldorf Astoria Hotel. (Photo by Yale Joel/The LIFE Picture Collection/Getty Images)
American future First Lady Jacqueline Kennedy (1929 - 1994) and her daughter Caroline pause on the stairs of their vacation home and look back down, Hyannisport, Massachusetts, September 1960. Ms. Kenney wears a trenchcoat and a flower-print scarf over her hair while Caroline is dressed in a overalls. (Photo by Alfred Eisenstaedt/The LIFE Picture Collection/Getty Images)
Jackie Kennedy and friends, circa 1960s. (Photo by Fotosearch/Getty Images).
CIRCA 1960s: Former First Lady Jacqueline Kennedy enjoys herself at a picnic circa the 1960s. (Photo by Michael Ochs Archives/Getty Images)
DISTRICT OF COLUMBIA, UNITED STATES - 1961: President Kennedy (R) with First Lady Jackie (L) (in fur-trimmed suit designed by Oleg Cassini) at his inauguration. (Photo by Leonard McCombe/Life Magazine/The LIFE Picture Collection/Getty Images)
PARIS, FRANCE - UNSPECIFIED DATE: American president John and Jackie Kennedy at the American Embassy during 1961 in Paris, France. (Photo by S010/COLLECTION SALINGER/Gamma-Rapho via Getty Images)
The newly-elected President John Fitzgerald Kennedy with wife Jackie after giving the traditional acceptance speech. USA, November 1960 (Photo by Mondadori Portfolio via Getty Images)
Frank Sinatra escorting Jacqueline Kennedy to her box at a gala, held at the National Guard Armory in Washington DC, the night before the inauguration of President John F. Kennedy, 19th January 1961. The gala was staged by Sinatra to help pay off the campaign debts of Kennedy and the Democratic Party. (Photo by GAB Archive/Redferns)
Portrait of American First Lady Jacqueline Kennedy (1960 - 1999) in the Red Room of the White House, Washington DC, January 15, 1962. During the filming of a CBS News Special program called 'A Tour of the White House with Mrs. John F. Kennedy,' she stands in front of an Alfred Wordsworth Thompson painting of the Civil War battle at Balls Bluff, Virginia. (Photo by CBS Photo Archive/Getty Images)
The President and Mrs. Kennedy attend a White House Ceremony February 19, 1963. (Photo by National Archive/Newsmakers)
First Lady Jackie Kennedy speaks to a guest while attending a White House ceremony January 8, 1963 in Washington, DC. (Photo by National Archive/Newsmakers)
UNITED STATES : A contemporary report ran: ?Caroline, five, moves into the big time. Big day for a small girl. The day she moved from the junior to the senior class. The day she rode not her own pony, Macaroni, but mother?s horse, Rufus, with her mother. The girl is Caroline Kennedy, five-year-old daughter of America?s President John Kennedy and his wife Jacqueline.? President Kennedy was assassinated later that year, on November 22. (Photo by SSPL/Getty Images)
18th October 1968: Millionaire shipping magnate Aristotle Onassis (1906 - 1975) with his wife Jackie (Bouvier Kennedy, 1929 - 1994). (Photo by Central Press/Getty Images)
Jackie Kennedy Onassis, Caroline Kennedy (left), John F. Kennedy, Jr., and Lee Rodziwill (Photo by Ron Galella/WireImage)
Jackie Onassis, Anthony Radziwill, and Tina Radziwill (Photo by Ron Galella/WireImage)
Jackie Onassis during Jackie Kennedy and Family Shopping in Capri - August 24, 1970 in Capri, Italy. (Photo by Ron Galella/WireImage)
Jackie Kennedy Onassis in Capri, Italy. (Photo by Ron Galella/WireImage)
Jackie Onassis (Photo by Ron Galella/WireImage)
Jackie Onassis with son John Kennedy Jr during Jackie Onassis Sighting at the Philharmonic Hall - December 13, 1971 at The Philharmonic Hall in New York City, United States. (Photo by Tom Wargacki/WireImage)
Washington, D.C. May 14th 1976. Jackie Onassis and Alexandrje Orfila at The Kennedy Center (Photo by Tom Wargacki/WireImage)
Jackie Onassis and Alex Orfila during OAS Party following the Kennedy Center Gala at Kennedy Center in Washington D.C., United States. (Photo by Ron Galella/WireImage)
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