Every season of Citadel ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Citadel!

Mason Kane and Nadia Sinh – top agents of the independent spy organization Citadel – collide with a nefarious, new syndicate – Manticore – leading to catastrophe. Eight years later, Mason Kane is living a quiet life as "Kyle Conroy," with no memory of his past. Until one day an old colleague enlists his help to stop a now powerful Manticore from creating a new world order.

The Human Enigma

Kyle and Bernard journey to New York City to steal the Citadel X Case from Manticore Headquarters before it’s too late. Later, Kyle learns that a figure from his past is still alive and he risks everything to find them.

Spies Appear in Night Time

As Kyle and Nadia land at an old safehouse, small clues about their past life together bubble to the surface. Soon, they discover a former ally who may be key to stopping Manticore is imprisoned in a facility in Morocco. In order to rescue him they first have to enlist the help of a local crime boss. But their mission is compromised as secrets of the past are unearthed.

Infinite Shadows

After the shocking revelation of Abby’s former identity, we learn of the past entanglements between Mason, Nadia and Celeste, and a horrific decision that reverberates still today. Meanwhile, Nadia and Kyle land at the Manticore compound in Morocco and risk their lives to free their fellow spy. But their hero’s welcome is short-lived as they are forced to grapple with a dangerous accusation.

Tell Her Everything

Nadia, Kyle and Carter are forced to work together to escape from Manticore and protect the X Case, but suspicion of one of our heroes reaches a boiling point, leading to an explosive reckoning.

Time Renders Us Enemies

With one of their own being held hostage by Manticore, Kyle, Nadia and Carter risk everything to save them and thwart Manticore’s plans to acquire nuclear weapons. As our heroes grapple with the nuclear threat, the identity of the mole within Citadel will be revealed, as will the awful truth that everything they know is a lie.

Secrets in Night Need Early Rains

What if you lost your memory? What if a spy didn’t know they were a spy? Years ago, the top agents of Citadel, Mason Kane and Nadia Sinh, had their minds wiped. But, they’re called back to action as sinister forces emerge from the past. With the help of spymaster Bernard Orlick, these former lovers must remember the past to save the future.

Part 2 of the Citadel Universe (1. Honey Bunny, 2. Citadel S1, 3. Citadel:Diana)

The Best Seasons of Citadel

The Best Seasons of Citadel

Season 1