Follow a dysfunctional team of MI5 agents—and their obnoxious boss, the notorious Jackson Lamb—as they navigate the espionage world's smoke and mirrors to defend England from sinister forces.

Gary Oldmanas Jackson Lamb
Jack Lowdenas River Cartwright
Kristin Scott Thomasas Diana Taverner
Hugo Weavingas Frank Harkness
Jonathan Pryceas David Cartwright
Saskia Reevesas Catherine Standish
Christopher Chungas Roddy Ho
Rosalind Eleazaras Louisa Guy
Aimee-Ffion Edwardsas Shirley Dander
Sam Hazeldineas Moe
Will Smith
Morwenna Banks
Daniel Pemberton
Pablo Clements