<P> On October 26 , 1985 , Dr. Emmett Brown arrives in his flying time machine and persuades Marty McFly and his girlfriend , Jennifer Parker , to come back to the future with him to 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 . </P>
<P> On October 26 , 1985 , Dr. Emmett Brown arrives in his flying time machine and persuades Marty McFly and his girlfriend , Jennifer Parker , to come back to the future with him to 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 . </P>
when did marty mcfly go to the future in 2015
when did marty mcfly go to the future in 2015
October 26 , 1985
October 26 , 1985