Citadel Season 1 – Release Date, Cast, Plot, Complete Season Guide

Citadel Season 1 releases on Friday, April 28, 2023, with a two-episode premiere. The series finale episode airs on May 26, 2023. This season only consists of six episodes. According to The Hollywood Reporter, Citadel Season 2 has already been greenlit. Check out Celebrity Myxer’s insightful recaps, updated news, cast additions, trailers, social media reactions, and more. Here is the most comprehensive coverage of the Citadel!

Release Date & Time: Fridays at 12 am ET, 11 pm CT (the previous day), and 9 pm PT (the previous day) on Prime Video.

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Citadel Season 1 Synopsis

In the aftermath of Citadel’s fall, elite agents Mason Kane and Nadia Sinh, stripped of their memories, have spent eight years hidden under new identities. When a former ally seeks help to thwart the powerful Manticore syndicate’s sinister plans, the duo embarks on a perilous global mission, navigating a web of secrets, lies, and dangerous, unyielding love.

Citadel Season 1 Recap

Here are mini recaps of each episode from the first season…

Season 1 Episode 1 Premiere “The Human Enigma”

Richard Madden as Mason Kane and Priyanka Chopra Jonas as Nadia Sinh in Citadel Season 1 Episode 1 Premiere

Richard Madden as Mason Kane and Priyanka Chopra Jonas as Nadia Sinh in Citadel Season 1 Episode 1 Premiere

Eight years ago, Nadia and Mason were on a covert operation on a speeding train in Italy. After a confrontation, Nadia learned that Citadel would be disbanded by Manticore. A bomb detonated, and Mason was found with amnesia, taking on the identity of Kyle Conroy. Nadia was missing, and presumed dead.

Later, Dahlia Archer seeks the Citadel X-Case and enlists Anders Silje’s help. Mason, now with a family, is kidnapped by his former Citadel colleague, Bernard Orlick, who reveals his true identity as a spy. Bernard explains the importance of the X-Case and asks for Mason’s help to retrieve it, mentioning Nadia’s presumed death. In a flashback, it’s revealed that Nadia survived the train explosion years ago.

Season 1 Episode 2 “Spies Appear In The Night Time”

Mason breaks into a Manticore lab to steal the Citadel X-Case in Citadel Season 1 Episode 2

Mason breaks into a Manticore lab to steal the Citadel X-Case in Citadel Season 1 Episode 2

In a flashback, Nadia survives an explosion and loses her memory due to a safety protocol. Eight years later, Mason and Bernard set out to recover the stolen Citadel X-Case in New York City. After facing resistance, Mason retrieves the case and learns its importance. Anders catches up to them, and Mason escapes with the case while Bernard is taken captive.

Mason finds Nadia in Spain, who initially doesn’t recognize him. When her memories are restored, she helps defeat Anders, and they escape. Dahlia orders Anders to retrieve Mason, while she interrogates the captured Bernard for Citadel secrets.

Season 1 Episode 3 “Infinite Shadows”

Mason and Nadia nearly kiss in Citadel Season 1 Episode 3

Mason and Nadia nearly kiss in Citadel Season 1 Episode 3

Amnesiac Mason questions his trust in Nadia as they navigate their past and present relationships. Flashbacks reveal Mason’s daring mission to steal a deadly virus, during which he first meets Nadia. Despite growing closer, trust remains uncertain as they face betrayals and double-crosses.

Bernard endures torture while Dahlia threatens his family. Meanwhile, Mason learns of Nadia’s possible involvement in Citadel’s fall and her true allegiance. Bernard offers Anders a deal to reveal Brielle (who is actually Abboy Conroy) is alive and is now married to Kyle/Mason. Anders and Brielle were once in a relationship!

Season 1 Episode 4 “Tell Her Everything”

Nadia and Mason kiss in Citadel Season 1 Episode 4

Nadia and Mason kiss in Citadel Season 1 Episode 4

Mason and Nadia execute a daring rescue mission at a black site in Morocco, saving Carter Spence amidst a hail of gunfire. Flashbacks reveal a tangled web of secrets, deceptions, and high-stakes operations, centered around the enigmatic operative Celeste Graham, known as Brielle. Tasked with infiltrating the Silje brothers’ operations, Brielle delves deep undercover, setting her sights on Anders Silje and the powerful Oz Key, a tool capable of seizing control of a nation’s technology. As time wears on, Mason’s worries about Brielle’s long silence morph into a suspicion of betrayal.

Convinced of Brielle’s treachery and fueled by his love for Nadia, Mason takes a drastic step – orchestrating a memory wipe, or “Backstop”, for Brielle. He does so under the guise of a relocation program, a lie he hides from Nadia. Following the procedure, an emotional Nadia thanks Mason, unaware of his dark secrets. The episode culminates in a shocking twist as Carter reveals Nadia as the true thief of the Oz Key. Mason is left reeling, torn between his love for Nadia and the harsh reality of her betrayal.

Season 1 Episode 5 “Time Renders Us Enemies”

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Season 1 Episode 6 Finale “Secrets in Night Need Early Rains”

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Citadel Season Trailer

Check out the official trailer…

Citadel Cast

  • Richard Madden as Mason Kane/Kyle Conroy
  • Priyanka Chopra Jonas as Nadia Sinh/Charlotte Vernon
  • Stanley Tucci as Bernard Orlick
  • Ashleigh Cummings as Abby Conroy
  • Moira Kelly as Joe
  • Caoilinn Springall as Hendrix Conroy
  • Lesley Manville as Dahlia Archer
  • Timothy Busfield as Simmons
  • Joseph Millson as Montgomery
  • Roland Møller as Anders Silje and Davik Silje (twin brothers)
  • Osy Ikhile as Carter Spence
  • Nikki Amuka-Bird as Grace
  • Gráinne Good as Valeria

Cast Bios

Mason Kane

A formidable agent of the Citadel, he is renowned for his unwavering determination, meticulous approach, and indomitable spirit. Following a life-altering mission overseas, Kane undergoes a memory wipe, erasing all recollections of his former self. For years, he has existed inconspicuously under the guise of “Kyle Conroy,” leading a tranquil existence devoid of any inkling of his past. However, fate turns unexpectedly when he is abruptly thrust back into the treacherous realm of espionage. Teaming up once again with his former partner, Nadia Sinh, Kane embarks on a perilous journey to unravel a labyrinthine tapestry of perilous secrets that not only jeopardize his loved ones but also pose a grave threat to the entire world.

Nadia Sinh

A daunting force characterized by her unwavering loyalty, exceptional intellect, and unwavering determination, is no ordinary individual. As the offspring of a former Citadel Director, her connection to the organization runs deep. Combining her natural intuition with an unrelenting competitive drive, Nadia swiftly ascended the ranks of Citadel, ultimately attaining the esteemed status of a Tier-One agent.

In the wake of Citadel’s demise, Nadia’s world is jolted when she uncovers the astonishing truth: Mason, whom she believed to be dead, is alive and well. United by a common purpose, they embark on a globe-spanning expedition, their objective set firmly on thwarting the nefarious spy syndicate known as Manticore. However, lurking within the shadows are secrets from Nadia’s past, whose revelation could potentially unravel everything they hold dear.

Bernard Orlick

A prodigious individual in every sense, he never shies away from proudly showcasing his exceptional intellect. As a tech virtuoso and esteemed spy, he has played a pivotal role in Citadel’s triumphant endeavors for a remarkable span of thirty years. With a penchant for innovation that knows no bounds, Bernard radiates wisdom and wit, effortlessly blending his overt inventiveness with a steadfast commitment to safeguarding his comrades.

Orlick, the mastermind behind Citadel’s operations, has left an indelible mark on the world. His ingenious creations have not only catalyzed the advent of the internet but also paved the way for revolutionary advancements such as Backstop. With an encyclopedic understanding of the inner workings of Citadel, Bernard stands as the unparalleled fountainhead of knowledge, guiding the organization toward success at every turn.

Dahlia Archer

Serving as the United Kingdom’s Ambassador to the United States, she epitomizes sharpness and meticulousness in every aspect of her being. Concealing her true intentions within a shroud of secrecy, it becomes apparent that a profound thirst for revenge fuels Dahlia’s every move. In the eyes of the public, she assumes a polarizing yet undeniably crucial role as a diplomat. However, behind the confines of closed doors, Dahlia wields an influence that extends far beyond diplomatic circles, permeating the clandestine realm of espionage with consequences that are both extensive and devastating.


Although there are troubled roots with this series (announced in 2018, creative staff replacements, reshoots, and the final budget tipping $200 million), it will air, and a second season has been ordered. Citadel is executively produced by the Russo Brothers. David Weil is the current showrunner and executive producer.


Citadel Season 1 - Release Date, Cast, Plot, Complete Season Guide

Citadel Season 1 Episode Guide

Season Episode Title Air Date
1 6 “Secrets in Night Need Early Rains” Citadel Season 1 Finale May 26, 2023
1 5 “Time Renders Us Enemies” May 19, 2023
1 4 Tell Her Everything May 12, 2023
1 3 Infinite Shadows May 5, 2023
1 2 Spies Appear In The Night Time April 28, 2023
1 1 The Human Enigma” Citadel Season 1 Premiere April 28, 2023

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Photo credit: Amazon Studios

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