When the TV show based on "Halo" was first announced, Kyle Killen was tapped as showrunner (Killen had previously worked on the one-series "Lone Star," "Awake" and "Mind Games"). Killen apparently dropped out, and Steven Kane ("American Dad! and "The Last Ship") has been named showrunner, and according to Variety, Kane will not stay on if "Halo" gets a second season. He will leave Budapest, where "Halo" is being filmed, and return to the United States.

Originally announced as a Showtime project, the "Halo" series will debut at Paramount+. Pablo Schreiber (THE WIRE and ORANGE IS THE NEW BLACK) has been cast as Master Chief, and Jen Taylor, who voiced Cortana in the game, will reprise her role. Natasha McElhone will play Dr. Catherine Halsey, Shabana Azmi will be Admiral Margaret Palangoski, and Boquim Woodbine will play Soren-006, a privateer and old friend of the Master Chief.

As for its content, the "Halo" TV show will be a new story, not a direct adaptation of the game or novel, but in 2018 Showtime's president of programming, Gary Levine, explained that it is "incredibly respectful of canon. "Halo is currently, Paramount+ and is slated for release in early 2022.