Citadel Season 1 premiered on April 28, 2023.
The series debuted globally on Prime Video with its first two episodes, followed by weekly releases. The first season concluded on May 26, 2023.
Pro tip: While the first season concluded in May 2023, a second season has been confirmed and is currently in production, though a specific release date for Season 2 has not yet been announced as of early 2026.