The Mandela Effect is a 2019 science fiction horror film written and directed by David Guy Levy, starring Charlie Hofheimer as a father grieving for the loss of his daughter. The character becomes obsessed with facts and events that many people remember incorrectly. Aleksa Palladino plays his also-grieving wife, while Robin Lord Taylor plays his best friend and brother-in-law, and Clarke Peters plays a washed-up scientist.

Plot

Computer game designer Brendan (Charlie Hofheimer) and his wife, Claire (Aleksa Palladino), are grieving for their daughter Sam (Madeleine McGraw), who drowned trying to retrieve her Curious George doll from the ocean. As they reluctantly rummage through Sam's belongings, Brendan finds a copy of The Berenstain Bears. To the bewilderment of Brendan and his brother-in-law Matt (Robin Lord Taylor), they remember the title with "Berenstein," even though they find no evidence that it was ever changed. This leads them to learn about many other examples of the "Mandela Effect," collectively shared "false" memories. Brendan and Claire discover further discrepancies, such as clearly remembering that Sam's doll had a tail when it actually does not.