Doc Brown, Marty McFly, Jennifer Parker, and Einstein the dog were sent back to 1955. They must make sure that Marty’s parents fall in love before they have to drive the DeLorean to catch the lightning strike at 10:04 p.m. Even if you are able to get his parents to fall in love ahead of time, you must continue to complete objectives to keep Biff at bay and get the DeLorean in place for the electrifying end of the game.