Corrected entry: Plutonium is not a red liquid, it is a white-silver coloured metal. Even oxidised in solution it would be paler than shown.
Andy Benham 6979
26th May 2011
Back to the Future (1985)
5th Mar 2009
Back to the Future Part II (1989)
Corrected entry: When the "old Biff" steals the time machine in 2015, as Doc and Marty attempt to retrieve Jennifer, it shouldn't be possible for Biff to return to the world that exists around him, as he gets out of the car back in 2015. Doc, Marty, Jennifer, and the world around them ALL should no longer exist, while still trying to escape from 2015. An alternate time line should have been created the moment "old Biff" left 1955. (Thus, Doc's explanation to Marty via the chalkboard explaining an "Alternate Reality"). This all started in 1985, and one result of old Biff's ventures, we learn that Doc is committed to an institution and couldn't even invent, or at least complete, the time machine by October 26th, 1985, which is the starting date of the initial film.
Correction: It is pointed out in all 3 films that the time lines aren't altered immediately (e.g. In the first film, Marty and his siblings fade out of the photograph that he holds, rather than just simply disappear). Just because Doc didn't invent the time machine doesn't mean someone else didn't instead (it is possible Marty did it himself using Doc's notes).
Correction: The official comics reveal that Doc had been performing time travel experiments in order to correct the timeline (this is the reason he was committed in the first place). These experiments didn't use a DeLorean, but still nonetheless involved time travel. In addition, an explanation of temporary "protective bubbles" that weaken as chances of timeline correction fade is also present.
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Correction: It wouldn't be safe to use plutonium metal. Even with the suits on, both Marty and Doc would be subject to lethally high amounts of beta and gamma radiation. Chances are they used a dilute solution (possibly plutonium (IV) chloride as that is red in colour) and it is possible to deeper red is down to dye or impurities in the solution - the latter is possible as Doc acquired it from terrorists.
Andy Benham 6979