This is a chronology of the events of the Back to the Future universe, including the animated series, the comics, Back to the Future: The Game, Back to the Future: The Card Game and Doc Brown Saves the World. These sources combined have provided a detailed explanation for how time travel works in the Back to the Future universe: The ripple travels backward through time as well as forward, allowing the time traveler to see their own future, before the time ripple catches up to them and the bubble protecting them pops.