After the success of the original mostly U.S.-based Citadel, which premiered in 2023 (starring Richard Madden and Priyanka Chopra Jonas) and is currently filming Season 2, the Citadel franchise is spawning several global sequels. An Indian version called Honey Bunny is due in the States on November 7, but first, there’s Citadel: Diana, a six-episode action set in an increasingly authoritarian 2030 Milan, Italy. The protagonist in this iteration is Diana Cavalieri, ostensibly an agent of the international crime syndicate Manticore, which destroyed the European branch of Citadel, another powerful group aiming to keep the world safe — sometimes with less than pristine methods. In reality, though, Diana is a Citadel agent and a mole who has been trying to escape Manticore since the Citadel take-down eight years earlier, during which she lost her only contact and handler Gabriele (Filippo Nigro) and became totally alone with the enemy. “Diana is strong and...