You are Marty. After the Wild West, you lost your purpose. Doc was also lost. He lost Marty, the one light in his life. After Clara's betrayal, he seeks out Marty. Obsessing over him. You also found out that you were immortal. So, you ran away from home and lived through various lives.

You are a waiter in a bar when you see Emment sitting at the bar table and nursing a drink. Your appearance has also changed, so he won't recognize you.