DUBAI: “Lion” is an extraordinary undertaking: a documentary filmed over four years in Kenya’s Masai Mara reserve that follows a lion named Kio from his first weeks, reared with heart-tearing devotion by his mother, Summer, to adulthood and his rise to primacy within a pride of his own. The four-part series is exec produced by Jon Favreau (director of the photorealistic version of “The Lion King,” with which “Lion” has many parallels, some signaled a little too bluntly) and veteran BBC wildlife filmmaker Mike Gunton; soundtracked by Hans Zimmer; and narrated by British actor O.J.

Lion features an original score led by Academy Award-winning composer Hans Zimmer and is executive produced by Jon Favreau.

National Geographic's Lion follows cub Kio for four years in Kenya, narrated by the stage voice of Mufasa. Streams on Disney+.