Season 1
- Richard Madden ( Game of Thrones ) as Mason Kane
- Priyanka Chopra Jonas as Nadia Sinh
- Stanley Tucci ( The Terminal ) as Bernard Orlick
- Lesley Manville as Dahlia Archer
- Osy Ikhile as Carter Spence
- Ashleigh Cummings as Abby Conroy
- Roland Møller ( ) as Anders Silje
- Caoilinn Springall as Hendrix Conroy
Citadel (2023) [Season 1, Episode 1]
The Human Enigma
Shown 28 Apr 23
Citadel (2023) [Season 1, Episode 2]
Spies Appear in Night Time
Shown 28 Apr 23
Citadel (2023) [Season 1, Episode 3]
Infinite Shadows
Shown 05 May 23
Citadel (2023) [Season 1, Episode 4]
Tell Her Everything
Shown 12 May 23
Citadel (2023) [Season 1, Episode 5]
Time Renders Us Enemies
Shown 19 May 23
Citadel (2023) [Season 1, Episode 6]
Secrets in Night Need Early Rains
Shown 26 May 23
