Back to the Future: Does physics of Marty's time travel add up

Today is 21 October 2015 – the date Marty McFly and Doc Brown travel to in Back to the Future Part II. Can we reconcile the films with reality?

time travel - Why was Marty present in his jump to 2015 in Back to the Future 2? - Science Fiction & Fantasy Stack Exchange

The Physics of Back to the Future, by Ethan Siegel, Starts With A Bang!

Back to the Future: The Complete Adventures [DVD] : Michael J. Fox, Christopher Lloyd, Bill Nye, Dan Castellaneta, Lea Thompson, Thomas F. Wilson, Mary Steenburgen, David Kaufman, Crispin Glover, Casey Siemaszko

How Time Travel Works (and doesn't) in Back To The Future [BTTF Week] - Overthinking It

Back to the Future DeLorean back in the spotlight in star-studded documentary - Hagerty Media, back to the future

Back to the Future: Why The DeLorean Had To Go 88mph To Time Travel

If Back to the Future isn't an accurate time travel movie, then what is? - Quora

Back To The Future: All 8 Timelines In The Movies Explained

Is Back to the Future the best movie on time travel? - Quora