Back to the Future Part II theory: There was a THIRD Marty McFly in Biff’s alternate 1985

They continued: “But there also should be a third Marty McFly, one who seems to have essentially been forgotten by everyone, who as far as I can tell has never been mentioned by anybody or completely confirmed, but who should logically should exist.

“That third forgotten Marty McFly I speak of is the Marty McFly who just got back from 1955 from the events of the first film the night before only to now find himself in what is essentially Hell Valley, probably terrified out of his wits with no knowledge of what was happening.

“Now from what I can tell from what Doc says later in the film when he’s using the chalkboard, time basically hasn’t yet ‘caught’ up yet, for lack of a better term, to Marty and Doc, hence why neither have faded from existence.

“Plus we know that Marty from 1955 has not vanished either as we see later in the film, so theoretically that Marty should have hit 88 MPH as lightning struck the clocktower and been sent back to the future, only to find himself in a future where Biff rules everything, correct?”