Originally Posted by Masta23
So Artie obviously wasn't supposed to receive his subpeona and getting him out of his apartment screwed up the timeline somehow? That is confusing because Artie needed to receive the subpeona so that Young Doc would work on the rocket drill.
In the original timeline young Doc had lots of time to work on the Rocket Drill, he didn't have to complete a working prototype TONIGHT. And when we get into the Soup Kitchen for the first time we see Kid specifically sending Arthur into the safehouse so he wouldn't receive the subpoena. So Marty does screw up by making Arthur actually RECEIVE the subpoena to make Doc work on the drill faster.