When the Halo-based TV show was first announced, Kyle Killen was attached as his showrunner (previously Killen worked on the wonders of a single Lone Star, Awake and Mind Games series). Apparently, Killen resigned and Steven Kane (his production credits include American Dad! And The Last Ship) took over as showrunner. According to Variety, even if Halo is picked up for a second season, Kane won’t stay. He will leave Budapest, where Halo is filmed, to return home to the United States.
Although initially announced as a Showtime project, the Halo series will debut on Paramount +. Pablo Schreiber of The Wire and Orange is the New Black has been chosen as headmaster, and Jen Taylor, who voiced Cortana in the games, will reprise her role. Natascha McElhone will play Dr. Catherine Halsey, with Shabana Azmi as Admiral Margaret Parangosky and Bokeem Woodbine as the privateer and old friend of the master chief named Soren-006.
On the subject, the Halo TV show will be a new story rather than a direct adaptation of any of the games or novels, although in 2018 Showtime programming president Gary Levine described it as "incredibly respectful of the canonHalo is currently scheduled for release in early 2022 on Paramount +.