Just finished the first two episodes and I still don't understand why Doc vanished at the beginning of the game. Einstein was in the DeLeoreon and then Doc started fading, and it turns out he was in jail in 1931. But when did he even time travel to 1931? It was Einstein who was in the DeLoreon. Did I miss something? Or is it explained in later episodes. If its explained in later episodes just say so and don't spoil it for me, but if it's not, It's racking my brain that I can't figure out why!