Something I never thought of. SPOILERS

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Archived from the IMDb Discussion Forums — Back to the Future Part III

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GreenGoblinsOckVenom86 — 9 years ago(January 31, 2017 05:16 AM)

So both Doc Brown and Marty contemplated killing Mad Dog Tannon but they both seemed to forget that he's the great grandfather of Biff Tannon. So by killing him they're also killing Biff. Good thing Marty just knocked him out instead of killing him, huh?
"I'll be back!" The Terminator

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muchmeow — 9 years ago(February 08, 2017 03:15 PM)

I don't recall either of them planning to kill Buford.