in back to the future part ii marty and dr. emmett brown go to which future date
Back to the Future Part II On October 26, 1985, Dr. Emmett Brown arrives in the DeLorean time machine and persuades Marty McFly and his girlfriend, Jennifer Parker, to travel to the future with him, and help their future children. Biff Tannen witnesses their departure. They arrive on October 21, 2015, where Doc electronically knocks out Jennifer, and leaves her asleep in an alley, explaining that she should not have too much knowledge of future events. He has Marty pose as his own son and lookalike Marty Jr. to refuse an offer to participate in a robbery with Biff's grandson Griff, thus saving both of Marty's children from prison.
List of Back to the Future characters Marty Jr. and Marlene McFly (both portrayed by Michael J. Fox) are Marty McFly and Jennifer Parker's future fraternal twin son and daughter in Part II.