While this isn’t exactly what we’re talking about at this website, this video is useful. It conveys a (possibly) relevant way of looking at time in a non-linear way.
Referencing different timestreams, it’s possible that — in those other realities — events in your (alternate) life are in a different sequence.
Or, as an alternate explanation of the Mandela Effect: Maybe you’re “remembering” things from the future… a future you’ve seen (in real life or dreams) due to something like Al’s time travel explanation.
When I talk about parallel realities and “sliders,” I often refer to the Sliders TV series. It aired from 1995 through 2000, and was an innovator in presenting alternate history themes.
Sliders TV Series – Pilot
Here’s a preview from the movie-length pilot for the series.
Sliders TV Series
More information about the Sliders TV series, from Wikipedia:
Sliders is an American science fiction television series. It was broadcast for five seasons, beginning in 1995 and ending in 2000. The series follows a group of travelers as they use a wormhole to “slide” between different parallel universes.
The nature of the Sliders TV series changed throughout the seasons. The first two seasons focused on alternate histories and social norms, with the consensus amongst the creative team maintaining these two seasons to be largely superior to what would come later on during the series’ third season.
These stories explored what would have happened, for example, if America had been conquered by the Soviet Union, if Britain had won the American War of Independence, if penicillin had not been invented, or if men were subservient to women.
The Sliders TV series was created by Robert K. Weiss and Tracy Tormé. Tormé, Weiss, Leslie Belzberg, John Landis, David Peckinpah, Bill Dial and Alan Barnette served as executive producers at different times of the production.
For its first two seasons it was produced in Vancouver, British Columbia, Canada. Sliders was filmed primarily in Los Angeles, California, USA in the last three seasons.
The first three seasons of the Sliders TV series were aired by the Fox Network. Originally canceled after the first season, the series was renewed after a fan protest.
After Fox canceled the show again after three seasons, the series moved to The Sci-Fi Channel for its final two seasons.
The last new episode first aired on December 29, 1999 in the United Kingdom, and was broadcast on The Sci-Fi Channel on February 4, 2000.
* Quinn Mallory (seasons 1-4), played by Jerry O’Connell * Wade Kathleen Welles (seasons 1-3, voice of Wade in “Requiem”, S5e11), played by Sabrina Lloyd * Rembrandt Lee “Crying Man” Brown (seasons 1-5), played by Cleavant Derricks * Professor Maximillian P. Arturo (seasons 1-3), played by John Rhys-Davies * Maggie Beckett (seasons 3-5), played by Kari Wührer * Colin Mallory (season 4), played by Charlie O’Connell * Quinn Mallory (2) a.k.a. Mallory (season 5), played by Robert Floyd * Diana Davis (season 5), played by Tembi Locke
Recurring Guest Stars
* Colonel Angus Rickman, played by Roger Daltrey (“The Exodus” parts 1 and 2 (S3e16–17)) and Neil Dickson (episodes “The Other Slide of Darkness”, “Dinoslide”, “Stoker” and “This Slide of Paradise” (S3e21, S3e23-25))
* Elston Diggs, played by Lester Barrie (episodes “Double Cross”, “The Dream Masters”, “Desert Storm”, “Dragonslide”, “Murder Most Foul”, and “The Breeder” (S3e2, S3e5-7, S3e13, S3e19))
* Doctor Oberon Geiger, played by Peter Jurasik (episodes “The Unstuck Man”, “Applied Physics”, and “Eye of the Storm” (S5e1-2, S5e17))
For many people — including me — the Sliders TV series was an introduction to alternate history and the idea of sliding from one reality to another.