Jack Harper is a fictional character from the movie Oblivion, released in 2013. He is portrayed by actor Tom Cruise and serves as a drone repairman stationed on a post-apocalyptic Earth. His primary mission is to maintain and operate drones that protect the remnants of humanity from alien threats. As the story unfolds, Jack begins to question his memories and the reality of his mission. He discovers hidden truths about his past and the fate of the planet, leading him to confront the larger conflict between humans and the alien invaders known as the Scavs.