Time circuits on. Time circuits on? What do you mean Time Cur...
Doc: Time circuits on.
Marty McFly: Time circuits on? What do you mean "Time Curcuits on"? Doc, we're not going back now!
Marty McFly: Doc, What about Jennifer? What about Einstein? We can't just leave them here.
Doc: Don't worry, Marty. Assuming we succeed in our mission, this alternate 1985 will be changed back into the real 1985, instantaneously transforming around Jennifer and Einie. Jennifer and Einie will be fine, and they'll have absolutely no memory of this horrible place.
Marty McFly: Doc... what if we don't succeed?
Doc: We must succeed.