Citadel producers Angela Russo-Otstot and David Weil tease whether season 2 of the spy thriller will see the titular organization get rebuilt. Citadel season 1 ended with the revelation that Mason Kane (Richard Madden) was the mole who destroyed Citadel in the first place, albeit accidentally by handing over a list of agents to Dahlia (Lesley Manville). Said agents had been involved in a mission gone wrong that killed his father, something he was seeking revenge for. Season 1 ends with the titular agency still destroyed, with no clear answer about its return.