Main
Kunal Nayyar as Aadesh Chopra, a cybersecurity technician
Georgina Campbell as Natalie Thompson, a tax consultancy finance manager
Elyes Gabel as Sean Tilson, a mysterious ex-military operative
Elizabeth Henstridge as Tara McAllister, a psychology research fellow at Oxford University
Angel Coulby as Vanessa Okoye, a senior NCA investigator and former RMP officer
Tom Rhys Harries as Eddie Walker, a wealthy history student at Oxford University
Robert Glenister as Martin Copeland, the COO of Cooper-Newman Public Relations
Lydia West as Monique Thompson, an NYU student and Natalie’s younger sister
Clare Perkins as Lydia Thompson, Natalie and Monique's mother
Gerran Howell as Leonardo 'Leo' Newman, an Oxford University student and Katherine’s son
Karl Johnson as Eric Cresswell, a former professor of mathematics and climate modelling at Cambrook University
Jennifer Ehle as Amy, the CEO of International Oil and Petroleum Energy
Noah Emmerich as Scott Anderson, an FBI Violent Crimes and Major Offenders (VCMO) special agent assisting the NCA
Uma Thurman as Katherine Newman, the CEO of Cooper-Newman Public Relations and nominee for Ambassador to the United Kingdom
