Jetter Mars (ジェッターマルス, Jettā Marusu) is an anime series directed by Rintaro and written by Osamu Tezuka. Originally planned by Tezuka as a full-color remake of the original anime adaptation of his popular manga series Astro Boy, unfavorable circumstances during the pre-production phase of the project led him to abandon it temporarily and create Jetter Mars instead. Although it remains as one of Tezuka's lesser known works, it gained a large following and is fondly remembered.