Matthew Macfadyen John Stonehouse Actor, Executive Producer Kevin R. McNally Harold Wilson Actor Keeley Hawes Barbara Stonehouse Actor Simon Greenall Speaker at The House of Commons Actor Dorothy Atkinson Betty Boothroyd Actor Celia Robertson Civil Servant Actor Dainton Anderson Young Matthew Stonehouse Actor Orla Hill Jane Stonehouse Actor Brian Caspe Czech Government Official Actor Ieva Andrejevaite Irena Bala Actor Igor Grabuzov Alexander Marek Actor Timothy Walker Charles ElwelWill Adamsdale:Harry EvansDevon Black:Margaret ThatcherAlbert Welling:Cliff Michelmore Actor Emer Heatley Sheila Buckley Actor Aoife Checkland Julia Stonehouse Actor Jon S. Baird Director, Executive Producer John Preston Writer, Executive Producer Ruth Kenley-Letts Producer, Executive Producer Ellie Wood Producer, Executive Producer Rolfe Kent Original Music Neil Blair Executive Producer Polly Hill Executive Producer Diederick Santer Executive Producer