Characters played by Matthew Macfadyen
Charles Ingram
Characters played by Sian Clifford
Diana Ingram
Characters played by Mark Bonnar
Paul Smith
Characters played by Aisling Bea
Claudia Rosencrantz
Characters played by Elliot Levey
David Briggs
Characters played by Risteard Cooper
David Liddiment
Characters played by Trystan Gravelle
Adrian Pollock
Characters played by Michael Jibson
Tecwen Whittock
Characters played by Helen McCrory
Sonia Woodley QC
Characters played by Michael Sheen
Chris Tarrant
Characters played by Andrew Leung
Kevin Duff
Characters played by Jasmyn Banks
Nicola Howson
Characters played by Seraphina Beh
Ruth Settle
Characters played by Matt Butcher
Contestant
Contestant Next to Tecwen
Characters played by Paul Bazely
Lionel from Legal
Characters played by Keir Charles
Steve Knight
Characters played by Scott Handy
Larry Whitehurst
Characters played by Beau Gadsdon
Polly Ingram
Polly Portia Ingram
Characters played by Billie Gadsdon
Darcey Ingram
Characters played by Dolly Gadsdon
Pippa Ingram
Characters played by Jerry Killick
Paddy Spooner
Characters played by Maggie Service
Kerry the Floor Manager
Characters played by Geoffrey McGivern
Lieutenant Colonel Village
Characters played by Martin Trenaman
DS Ferguson
Characters played by Nicholas Woodeson
Nicholas Hilliard QC
Characters played by Thomas Bulpett
Mirror Photographer
Characters played by Michael Elwyn
Judge Rivlin
Characters played by Matt Blair
Mike Whitehall
Characters played by Mark Aaron Byrne
Stu Bloomberg
Characters played by William Chubb
Quiz Master
Characters played by Dean Nolan
Glitter Man
Characters played by Sasha Hails
Court Clerk
Characters played by Patrick Philpott
Intern
Characters played by Paul Hunter
Professor Alyn Morice
Characters played by Gracy Goldman
ITV Receptionist
Characters played by David Maybrick
Mirror Journalist
Characters played by John McAndrew
Brummie Contestant
Characters played by James Pearse
Head Juror
Characters played by Sonnyboy Skelton
Teenage Boy
Characters played by Tony Turner
Arthur Pollock
Characters played by Yaseen Aroussi
Teenage Boy
Characters played by Sarah Woodward
Maggie Pearce
Characters played by Jon Snow
Jon Snow
Characters played by Christopher Staines
Mensa Employee
Characters played by Hannah Bodenham
Dancer
Characters played by Myles Brown
Dancer
Characters played by Alastair Crosswell
Dancer
Characters played by Tanya Cumberland
Dancer
Characters played by Daisy Darvill
Dancer
Characters played by Matthew Gregory
Dancer
Characters played by Ramzan Miah
Dancer
Characters played by Katrina Ridley
Dancer
Characters played by Shawn Walters
Dancer
Characters played by Beth Willetts
Dancer
Characters played by Kishore Bhatt
Solicitor
Characters played by Ketan Majmudar
Jury Member
Characters played by Tony Holness
Studio Audience member
Characters played by Daniel Subin
The Studio Director
Characters played by Daniel Eghan
Press Officer
Characters played by Nick Davison
Audience member
Characters played by Pierre Bergman
Mensa Adjudicator
Characters played by Sanj Surati
Film Editor
Characters played by Rodrig Andrisan
Audience Member
Characters played by Minouche Kaftel
Juror Member #4
Characters played by Obie Matthew
PR Manager
Characters played by Jayne Smith
Solicitor
Characters played by Bex Finch
Assistant Floor Manager
Characters played by Jodi Hutton
Telephonist
Characters played by Jefferson King
F.E Scheduler
Jeff
Characters played by Sumit Chakravarti
DC Amir Cave
Characters played by Lieve Carchon
Audience Member
Characters played by Martin Alexander Colton
Quiz Master
Characters played by Morgan Archer
Security
Characters played by Owun Birkett
Audience member
Characters played by Salem Hanna
Audience Member
Characters played by Eliza Flores
Jury Member
Characters played by Richard Lipman
Technical Crew
Characters played by Arash Aliahmadi
Audience Member