| Kelly Macdonald | Karin Parke |
| Faye Marsay | Blue Colson |
| Benedict Wong | Shaun Li |
| Jonas Karlsson | Rasmus Sjolberg |
| Joe Armstrong | Nick Shelton |
| Elizabeth Berrington | Jo Powers |
| Charles Babalola | Tusk |
| Ben Miles | Tom Pickering |
| Esther Hall | Vanessa Dahl |
| Holli Dempsey | Clara Meades |
| Vinette Robinson | Liza Bahar |
| Georgina Rich | Tess Wallender |
| Duncan Pow | Garrett Scholes |
| Cecilia Noble | Dame Patricia Lamarr |
| Katherine Kingsley | Dana Costello |
| James Larkin | Simon Powers |
| Robin Pearce | Harry Barclay |
| Adrian Lukis | Home Secretary, Alex Wallis |
| Jane Bertish | Head of MI5 |
| Anita Anand | News Anchor |
| Thomas Dominique | Roadie |
| Leonie Elliott | Fiona, Clara's Flatmate |
| Reon Smith Marshall | Aaron Sheen |
| Mateusz Mirek | Delivery Man
(as Matheus Mirek) |
| Jeremy Booth | Dog Walker |
| Tom Ashley | Paramedic |
| Matt Forde | Pundit |
| Faiza Shaheen | Pundit |
| Imogen Daines | MRI Technician |
| Ziggy Heath | MRI |
| Michael Bott | Inquiry Official |
| Laraine Dix | Member of the jury |
| Sam Hardy | Roadie |
| Shaun Hume | Angry Man |
| Lasco Atkins | Scientist
(uncredited) |
| Roy Beck | Tribunal Witness
(uncredited) |
| Matthew D. Gilpin | Angry Video Blogger
(uncredited) |
| Ty Hurley | Granula Gate Security
(uncredited) |