Utopia

Adeel Akhtar

Wilson Wilson

Paul Higgins

Michael Dugdale

Neil Maskell

Arby

Fiona O'Shaughnessy

Jessica Hyde

Alexandra Roach

Becky

Nathan Stewart-Jarrett

Ian Johnson

Oliver Woollford

Grant Leetham

Alistair Petrie

Geoff Lawson

Ruth Gemmell

Jen Dugdale

Anna Madeley

Anya Levchenko

Tim McInnerny

Airey Naeve

Corey Johnson

Niall

Kevin Eldon

Tony Bradley

David Calder

Dobri Gorski

Will Attenborough

Ben

Diana Hardcastle

CIA Woman

Alan Williams

Danny "The Tramp"

Michael Smiley

Detective Inspector Joshua Reynolds

Oliver Dimsdale

Greg Ashby

Sacha Dhawan

Paul

Allan Corduner

Ross

Tom Burke

Philip Carvel

Michael Maloney

Christian Donaldson

Simon McBurney

Professor Donaldson

James Fox

The Assistant

Stephen Rea

Conran Letts

Lloyd Hutchinson

William Kaye

David Sibley

Jack Tate

Rose Leslie

Milner

Anca Androne

Brosca

Ed Birch

The Assistant

Trystan Gravelle

Tom

Kevin Trainor

Mr. Omida

Clive Wood

Dr. Isherwood

William Belchambers

Christos

Aine Garvey

Young Jessica

Mark Stobbart

Bejan Chervo, Bejan

Pixie Davies

Amanda

Diane Morgan

Tess

Juliet Cowan

Bridget

Alex Lowe

Ben's Dad

Gerard Monaco

Joe

Emilia Jones

Alice Ward

Teresa Banham

Alice's Mum, Mrs. Ward

Emil Hostina

Marius

Ṣọpẹ́ Dìrísù

Roy

Paul Ready

Lee

Mitchell Mullen

Lane Monroe, Monroe

Geraldine James

Milner

Ian McDiarmid

Anton

Steven Robertson

Terrence

Gary Cargill

Detective Leeman

Simon Farnaby

Marcus

Hermione Gulliford

Diane

Stewart Scudamore

Milton Wilson

Gavin Spokes

Large Man

Danny Kirrane

Clerk

Andrew Readman

Lawyer

Sylvestra Le Touzel

Leah, Leah Gorsand

Ben Bishop

Corporal

Eleanor Matsuura

Bev

Jay Simpson

Detective Richmond

Dan Tetsell

Headteacher

Paapa Essiedu

Roy

Michael Yare

Soldier

Ian Porter

Scientist

Sutara Gayle

Midwife

Solomon Mousley

Holding Facility Guard

Sarah Churm

Grant's Mum

Vincenzo Ferrera

Mino Pecorelli (as Vincenzo Ferrara)

Mark Bagnall

Well Dressed Drunk