My sons told me I should watch a short (26 half-hour episodes) anime called Cowboy Bebop. It's set in the future when mankind has moved off earth to Mars and the asteroids. It follows the adventures of the spaceship Bebop and it bounty hunter crew. They do a great job of weaving the world design, backstories, characters, voice work and artwork. Oh, yes, the opening credits and music that are worthy of a James Bond movie. It's one of the rare times that everything works, and definitely work a look. Be sure to view the episodes in order, as they build on each other. Note: there are violent scenes in here, so it's not suitable for pre-teens.