Back to the Future: Part II Limited Collector's Edition 4K UHD Steelbook4K Ultra HD + Blu-ray (Collector's Edition Steelbook)Genre: Sci-FiLabel: Universal PicturesDescription: Brace yourself - as the most spectacular history-altering adventure of all time continues in the hit sequel that proves lightning can strike twice! Marty and Doc (Michael J. Fox and Christopher Lloyd) have barely recovered from their first time-travelling adventure when they launch themselves once more into the space-time continuum. But this time around their attempt to fine-tune the future in the year 2015 creates an outlandish alternate 1985 Hill Valley where Biff Tannen is rich powerful and... Marty's dad! Now their only chance to fix the present is by going back to 1955 all over again. But can Doc and Marty patch up the past without igniting a universe-shredding time paradox?