Richard Madden Returns as Citadel Hits Amazon Prime Video on May 6, 2026

amazon prime video will bring Citadel back on May 6, 2026, with Richard Madden returning as Mason Kane in Season 2. The six-episode series comes after a first season that cost $300 million and drew a divisive 51% score from critics on Rotten Tomatoes.

Prime Video built the franchise from scratch with Joe and Anthony Russo, then expanded it into an international spy property that was supposed to stretch beyond the flagship show. Instead, Citadel: Honey Bunny and Citadel: Diana were both cancelled after Season 1, leaving the main series to carry the brand.

Madden, Chopra Jonas, Tucci

Richard Madden starred alongside Priyanka Chopra Jonas in Season 1, and both are part of the franchise’s core identity. The returning cast this season also includes Stanley Tucci, Lesley Manville, and Ashleigh Cummings, giving the second season continuity even as the wider spinoff plan shrank.

The official synopsis says Mason Kane, Nadia Sinh, and Bernard Orlick are pulled back into action after the fall of the Citadel agency at the hands of Manticore. That setup keeps the story centered on the same three-figure spine instead of reopening the franchise around a new offshoot.

Season 2 on May 6, 2026

The May 6, 2026 premiere gives Prime Video a clear test of whether the brand can move beyond the production problems and reshoots that dogged the original rollout. A $300 million series that opened with a 51% critic score does not need more spinoffs first; it needs a cleaner second act.

For viewers, the practical takeaway is simple: the flagship series is back, the cast is mostly intact, and the spinoff experiment has already been pared down. If Citadel works this time, it will be because the main line holds without leaning on franchise sprawl.