The Butterfly Effect 3: Revelations

Sam Reide witnesses a woman being killed, then wakes up in an ice-filled bathtub, his vitals monitored by his sister Jenna. Sam can travel back to any moment during his lifetime, with his consciousness inhabiting his younger body. He helps the police under the guise of being a psychic. Sam pays Jenna's rent and buys her groceries, as she rarely leaves the apartment and lives in squalor.

Elizabeth, the sister of Sam's murdered girlfriend Rebecca, arrives at Sam's apartment. She believes the man about to be executed for her sister's murder, Lonnie Flennons, is innocent, and wants Sam to find the actual murderer. Sam meets with the man who tutored him on time travel, Goldburg, who reminds him of the cardinal rules: He is not to alter his past, nor travel in time with his body left unsupervised. When Sam was 15, a house fire killed Jenna, but Sam altered time, saving Jenna. Sam's interference resulted in the fire killing their parents. After Goldburg leaves the bar, their bartender Vicki seduces him.

Sam agrees to help Elizabeth, and travels back to June 1998. He runs into a drunk Elizabeth and tells her to stay in her car, then finds Rebecca dead. Elizabeth is killed in her car. Sam returns to the present to learn he no longer owns a car or works for the police and is renting out his couch. He is now a former suspect in Rebecca's murder who has repeatedly asked for the case file. He visits Lonnie, now a lawyer who needs a wheelchair. He tells Sam that on the night of the murder he drove by, saw Elizabeth and Sam talking, and did not stop. Sam visits Goldburg, who suggests he return to the scene of the third murder but only observe. Sam also visits Jenna, who is better off and living more cleanly. She refuses to help him.

Sam travels back and witnesses the third victim, Anita, being attacked, but it is her boyfriend catering to her rape fetish. Sam is discovered, and her boyfriend's punch returns him to the present, where Sam now rents a couch and is facing eviction for non-payment. Goldburg is missing, and Lonnie is now the third victim. Anita remains alive, pepper-spraying Sam in the face when he approaches her.

Jenna tells Sam that Goldburg intended to implicate him in the murders; she fears a future Sam is the murderer, and pinky-swears him to not time-travel anymore. A drunken Sam propositions Vicki, who is now engaged. After Sam leaves, the killer murders Vicki; her body is found by the police near an auto-body plant. Because Sam left his bar receipt behind, he is hauled in by the police. Jenna extricates him, and the police put a tail on him. Sam takes Detective Glenn's evidence notebook, which he uses to travel back to before the bodies were found.

He returns to the present to find himself on Jenna's couch as she leaves for work, reminding him to clean up after himself and have dinner ready for her return, their positions now reversed. Sam returns to the auto plant, where the police arrest him. Sam convinces Glenn to release him by telling Glenn how his wife mistook Glenn for M.C. Hammer on their first meeting. Returning home, Sam accidentally inhales some burundanga flowers, sent from Goldburg's greenhouse, and time-travels to the auto plant, finding a severely injured Goldburg. Running for help, Sam is felled by a foothold trap.

The killer approaches the trapped Sam, revealing herself as Jenna, who also time travels. She has an incestuous love for her brother, having killed the women either because she perceived them as rivals for Sam's affections, or because they were new witnesses, introduced by Sam's rescue attempts. Sam travels back to the day of the fire that killed his parents; instead of saving Jenna, he traps her in her burning room. He awakens in a timeline in which he has married Elizabeth and he, Elizabeth, and their daughter Jenna are arriving at a family barbecue, where he is greeted by his parents, Rebecca, and a healthy Goldburg. Sam's daughter Jenna puts her fashion doll on the grill and smiles as it burns.

The movie was filmed in Michigan and concluded filming in October 2008.[1] It debuted as part of the lineup for After Dark Horrorfest III, a horror film festival held in January 2009.[2] The film was released on DVD on March 31, 2009.

Reel Film Reviews characterized the 3rd installment as "A very mild improvement over the nigh unwatchable Butterfly Effect 2."[3]

• The Butterfly Effect 3: Revelations at IMDb
• The Butterfly Effect 3: Revelations at Rotten Tomatoes