Originally Posted by Shadowknight1
Posting from another thread as it is also relevant here:
When Marty arrives in 1931, Einstein paws at Edna and she says, "That mangy dog assaulted me once before" before going into the store, griping and whining about how something's a law and we should look it up. It can be inferred that when Doc was thrown in jail, Einstein then assaulted Edna, took the shoe, and went back to the DeLorean. That way, if Doc was fine, he was sitting there ready to go home. If he wasn't, he would arrive in 1986 to find Marty.
I agree. I think Einstein went to go wait in the hidden past DeLorean, the one that Doc used to get to 1931 not the future present one that Marty used to return Einstein to 1931, and so this theory can explain away where Einstein was. As for where the past Doc's Delorean is hidden and just how he believes it would not be found in any of the split timelines beats me. Time travel is a head ache. I'm not surprised you've found possible holes in TellTale's story. Otherwise, I definitely believe that Einie stole Edna's shoe prior to Marty returning to 1931.
Here's another theory: what if Enie didn't go back with Doc? What if Doc assumes Einie came there with Marty and doesn't question how or when Marty came to collect Einie? I'm still thinking the intro tutorial of Episode 1 ties in somewhere and Einie popped into the time stream some time he wasn't supposed to during the movie's testing of the Delorean and possibly returned to that point in time by this game's end to avoid the paradox/collapsing of the space-time continuum as seen in Marty's dream. But now I'm just grasping at air here. Obviously Einie got Edna's shoe, so he was obviously in that time period at some point. Eh, time travel and plot holes! What you going to do?