"The Babysitter" is the first part of the Halo Legends anime anthology, out of the 8 planned episodes that explore the origin and historical events of the Halo universe, in 3D CG and 2D anime format. This episode was animated by Studio 4°C, who also worked on the anime anthologies The Animatrix and Batman: Gotham Knight, that were created in a similar fashion (by several Japanese studios, using various animation styles). "The Babysitter" tells the story of four Helljumpers, sent on a mission to eliminate a key Covenant Prophet on a distant planet. Their biggest pre-mission concern: the Spartan who has been assigned to accompany them.