Citadel: Diana is the first Italian spy thriller and spin-off in Amazon Prime Video’s global Citadel franchise. The six-episode series will premiere on October 10, 2024, in a dystopian 2030 Milan, eight years after the original Citadel was dismantled. The show follows Diana Cavalieri (Matilda De Angelis) as an undercover agent placed in enemy rival syndicate Manticore, who finds herself wrapped up in a threatening power dynamic.