Back to the Future: Taking a ride in a 'time machine'
21 October 2015 Last updated at 09:28 BST
Hoverboards, video calls, and flat screen TVs were all the stuff of make-believe when Marty McFly and Doc Brown travelled ahead in time in the 1989 film Back to the Future II.
Today's date, the 21 October 2015, was the day they travelled to.
John Maguire reports.