What is doc brown back to the future?

Doc Brown, portrayed by actor Christopher Lloyd, is a key character in the Back to the Future movie trilogy. He is a quirky, eccentric inventor who creates a time machine out of a DeLorean sports car and brings the movie's protagonist, Marty McFly (played by Michael J. Fox), on a series of time-traveling adventures. Doc Brown is known for his catchphrases "Great Scott!" and "1.21 gigawatts!" and his wild white hair and lab coat. He is shown to be both a brilliant inventor and a loyal friend to Marty, always willing to help him on his adventures. Doc Brown's backstory and scientific acumen are only hinted at in the movies, but the character has become a beloved icon of 1980s pop culture.