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Old 11-07-2010, 02:55 PM
Don Draper is offline
Join Date: Sep 2001
Location: Philadelphia, PA
Posts: 4,937
Fanwank: The DeLorean, being a super-advanced bit of technology has at least a rudimentary intelligence. Sensing that the timeline had in some way become corrupted or maligned, instinctively sought out the help from the two people that it knew could fix things - Doc & Marty from the original timeline.

Biff likely wasn't even trying to get back to his original timeline - he would've wanted to go back to his proper point in history - albiet in the new timeline he created.

What Doc didn't have time to explain was that the DeLorean probably had enough power in it to make a one-time only "cross-timeline" jump back to the point at which it started out. Any other such "cross-timeline" jumps would've stressed the hull integrity of the DeLorean to the breaking point, rendering it useless.