Back to the Future is a classic science-fiction film directed by Robert Zemeckis and released in 1985. The story follows teenager Marty McFly, who accidentally travels back in time to 1955 in a DeLorean time machine invented by his friend, Doc Brown. In the past, he meets his parents as teenagers and must ensure they fall in love to avoid altering the future. Along the way, he must also find a way back to 1985 while avoiding the wrath of the local bully, Biff Tannen. The film's blend of science-fiction, comedy, and action made it a critical and commercial success, spawning two sequels and becoming a pop culture phenomenon. It also launched the careers of actors Michael J. Fox and Christopher Lloyd, who played Marty and Doc, respectively. Back to the Future remains a beloved classic and a testament to the power of great storytelling and filmmaking.