The series follows a 26th-century conflict between humanity and an alien threat known as the Covenant. Pablo Schreiber and Jen Taylor star as Master Chief Petty Officer John-117 and Cortana. The first season of Halo premiered on March 24, 2022, and ran until May 19. A second season, consisting of eight episodes, premiered on February 8, 2024.
Halo follows "an epic 26th-century conflict between humanity and an alien threat known as the Covenant" Executive producer Kiki Wolfkill said the series is a standalone story that takes place within its own "Silver Timeline" that is separate from and inspired by the core canon and lore of the transmedia franchise.