Matthew Macfadyen
as Major Charles Ingram
Michael Sheen
as Chris Tarrant
Sian Clifford
as Diana Ingram
Mark Bonnar
as Paul Smith
Helen McCrory
as Sonia Woodley QC
Michael Jibson
as Tecwen Whittock
Aisling Bea
as Claudia Rosencrantz
Elliot Levey
as David Briggs
Risteard Cooper
as David Liddiment
Trystan Gravelle
as Adrian Pollock