Name: Big Bang Theory: 'Past to Perfect Future'
Uploaded: 2016-07-14T04:38:33.000Z
Duration: 2 min 25 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

back to 1955, to give it to his younger self.

But as soon as he does that, he changes the future,

a different 2015, not the 2015 that Marty and Doc were in.

This is Hot Tub Time Machine all over again.

right after he gives young Biff the almanac,

he could get back to the 2015 with Marty and Doc in it.

Because it wasn't until his 21st birthday

for something that would have happened in the future

of a past that was affected by something from the future?

Okay, so, it wasn't until his 21st birthday

that Biff had will have placed his first bet

the alternate future he creates isn't the one

in which Marty and Doc Brown ever use the time machine

Marty and Doc never brought the time machine...

Marty and Doc never had have had brought?

not had have had brought the almanac to 1955 Biff.

Therefore, the timeline in which 1955 Biff gets the almanac

in which 1955 Biff never gets the almanac.

Never have, never hasn't, never had have hasn't.