The Halo television series is a live-action sci-fi adventure series set in the same universe as the popular Halo video game franchise. It follows a team of UNSC Marines and Office of Naval Intelligence (ONI) agents as they try to keep humanity safe from both the mysterious aliens known as the Covenant and the deadly Flood. The show begins with the first episode, “On the Brink of War”, which tells the story of a group of UNSC soldiers who are thrust into the middle of a hidden alien civil war. As they fight to survive, they discover that the stakes are even higher than they initially thought, as they uncover a secret weapon that could end the war, and save humanity. The show follows the main characters from the game, such as Master Chief John-117, the Arbiter, and Cortana, as well as introducing some new characters of their own. They explore the mysteries of the Halo universe and discover a hidden enemy that threatens to endanger the future of all life in the galaxy. The show is set to be released on Showtime in 2021.