Watchmen is set in a world where superheroes are a regular part of everyday life, and have been outlawed by the US Government. A vigilante detective named Rorschach uncovers a plot to murder superheroes. Starring Jackie Earle Haley as Rorschach, Billy Crudup as Dr. Manhattan and Jeffrey Dean Morgan as The Comedian, the film premieres on March 6, 2009.

1. Nite Owl Watches Rorschach Die: In the novel, Nite Owl does not see his old partner killed because he's with Silk Spectre but in the film, he does.MTV: Key Differences Between Graphic Novel, Film (February 24, 2009)
2. Snow globe: In the novel, young Laurie is shown dropping a snow globe while experiencing a flashback. During the title sequence in the film, there is a close up of the top of a television set, which features a snow globe with the snow fallingMTV: Key Differences Between Graphic Novel, Film (February 24, 2009)
3. Walking to Ozymandias' Fortress: In the novel, Nite Owl and Rorschach ride hovercrafts to Adrian Veidt's fortress after they crashed their ship in Antarctica. In the movie, they walk to Ozymandias' fortressMTV: Key Differences Between Graphic Novel, Film (February 24, 2009)
4. Dr. Manhattan Interview: In the novel, Dr. Manhattan is interviewed by a generic journalist on news talk show. In the film, Dr. Manhattan is interviewed by news veteran Ted KoppelMTV: Key Differences Between Graphic Novel, Film (February 24, 2009)
5. Where did the reporters go? In the novel, Dr. Manhattan is mobbed by reporters after his news show interview, so he makes all the reporters vanish and reappear outside. In the film, Dr. Manhattan makes himself vanish, only to reappear on MarsMTV: Key Differences Between Graphic Novel, Film (February 24, 2009)
6. Bad vibes: In the novel, reporters tell Dr. Manhattan interview that he might be causing those closest to him to have cancer. In the film, Dr. Manhattan's former lover, Janey Slater, arrives at the new talk show interview and removes her wig to reveal she is actually dying from the disease.MTV: Key Differences Between Graphic Novel, Film (February 24, 2009)
7. Psych-out: In the novel, psychologist Dr. Malcolm Long descends into his own downward mental spiral after his meetings with Rorschach. In the film, there is no Dr. Long or any similar storylineMTV: Key Differences Between Graphic Novel, Film (February 24, 2009)
8. Sober Comedian: In the novel, Laurie confronts Edward Blake (The Comedian) and throws a drink in his face. In the film, that interaction is not includedMTV: Key Differences Between Graphic Novel, Film (February 24, 2009)
9. Hitting the high notes: While both the novel and the film feature Archie breaking Rorschach out of prison, the film does not utilize the Screechers to do it. In the novel, the Screechers disable both the guards and the convicts with ear-piercing screamsMTV: Key Differences Between Graphic Novel, Film (February 24, 2009)

• Rorschach's tragic childhood is shown in detail. io9.com: Learn How Watchmen Changes The Graphic Novel's Ending (May 19, 2008)

• Rorschach will be killed by Dr. Manhattan. UGO.com: Watchmen Spoiler Zone (June 7, 2008)

• The Minutemen will appear in the film. UGO.com: Watchmen Spoiler Zone (June 7, 2008)

• Kovacs battles Big Figure. UGO.com: Watchmen Spoiler Zone (June 7, 2008)

• The squid is unleashed on New York City. io9.com: Learn How Watchmen Changes The Graphic Novel's Ending (May 19, 2008)