[NickHaflinger]

Enough all ready with this 88 mph requirement before the flux capacitor is activated. All they have to do is point the DeLorean east and the rotation of the earth will do the rest. Not to mention the earths orbital speed round the sun, the suns trajectory round the milky way and the milky ways trajectory in relation to the inertial reference frame, that's about 1.3 million miles per hour in the direction of Virgo.

Besides why didn't old-doc just post a letter to future-doc and get him to bury some plutonium in the desert in the past. Then old doc goes and collects the plutonium and goes-back-to-the-future and collects the letter and goes back to 1785 and burys some plutonium in the desert, then goes-back-to-the future .. my brain hurts ...

[ant6n]

Well, relativity tells us there are no preferred reference frames. But I believe relativity also tells us that time travel is not possible.

[NickHaflinger]

There are more plausible depictions of travelling through time out there than using a DeLorean travelling at 88 mph. Take Primer for instance:

"Primer (2004)" http://www.imdb.com/title/tt0390384/