The second trailer for Ben Affleck’s upcoming movie “Gone Girl” has been released. Affleck stars as Nick Dunne, a husband who becomes the suspect in his wife’s disappearance, in David Fincher’s dark film adaptation of Gillian Flynn’s hugely popular novel. Rosamund Pike plays Amy, the wife of Affleck’s character. The latest trailer, which gives a glimpse of Neil Patrick Harris as Desi Collings, Amy’s ex-boyfriend, provides a bit more insight into the mystery around Amy’s disappearance, including voiceovers from her diary. Fans beware: The movie’s posters offer clues about what might have happened to Amy, so view at your own discretion if you don’t want an early crack at solving the case. The film is slated to open Oct. 3.