Back to the Future II
Marty McFly and Doc Emmett Brown have barely recovered from their first time travel adventure, that they are propel back through time. But this time, in the heart of 2015, the manipulations of history made by our two pals cause a catastrophic change of Hill Valley in 1985, which turns into a terrifying place where the bad Biff Tannen became rich and powerful... Marty's father! The only way for them to restore order is to return again in 1955. But will Doc and Marty will be able to recover the past without causing a temporal paradox fateful for the universe ?