Flying Spaghetti Monster wrote:
About Back to the Future, when Marty wakes up after the adventure in the first film, how is it that he "merges" with his other self that must have experienced a normal life with his parents, including his improved father?
One of the unresolved questions of that movie (and one that would be confusing, so it makes sense to ignore it). The life that Marty comes back to isn't his own, but rather some other Marty's life, the Marty who time traveled from the Lone Pines mall at the end of the movie.
Realistically, it's a stretch that the new 1985 even minutely resembles the 1985 that Marty is from!