2022年9月19日 · When the old version of Biff Tannen arrives back in 2015 after a time travel trip in Back to the Future Part II, he seems ill for no apparent reason, and only a deleted scene explains just what happened to old Biff.

Because he was no longer alive by 2015 after having altered the timeline, Old Biff collapsed and faded from existence upon returning the DeLorean after his trip to 1955.

2012年2月5日 · In Back to the Future Part II, Doc picks up Marty in 1985 and takes him to 2015. Then old Biff realizes the Delorean is a time machine. Old Biff steals the Delorean and travels from 2015 to 1955 to give the 1955 version of himself the 2015 sports almanac.

2015年2月16日 · Our intention regarding old Biff was that upon his return to 2015, he would be erased from existence because he had changed his entire destiny by giving his younger self the Sports Almanac. (Probably, Lorraine shot him sometime around 1996!).

There's the ever so slight possibility that Marty and Doc could have gone forward to 2015 again and stopped Biff from stealing the time machine, but the odds were much higher of them having success if they went back to 1955 and retrieved the almanac.

2021年7月20日 · There is no possible way for Old Biff to get back to the original 2015 timeline that he's from, even if we took the deleted scene as cannon where he was erased shortly after, that should be the point when the future timeline also changes, too.

2010年9月11日 · So it seems that old Biff has returned to an alternate 2015 that instantaneously transformed around Marty, Doc, Jennifer, & Einstein. It's just that Hilldale doesn't look very different going from one timeline to the next.

2015C was an ABC timeline, and was a version of 2015 created when old Biff Tannen stole the DeLorean time machine and traveled back to 1955 to give his younger self the Grays Sports Almanac, which in turn resulted in the creation of 1985A.

What happened to old Biff when he staggered out of the DeLorean in 2015? Our intention regarding old Biff was that upon his return to 2015, he would be erased from existence because he had changed his entire destiny by giving his younger self the Sports Almanac.

2015年9月7日 · In 2015, when Biff realizes Doc Brown has invented a time machine, and gets a hold of the Almanac after Doc throws it away in the alley, he takes it, and steals the Delorean while Doc and Marty are getting 1985 Jennifer out of her 2015 house in Hilldale.