Adeel Akhtar
Wilson Wilson (12 eps)
Paul Higgins
Michael Dugdale (12 eps)
Neil Maskell
Arby (12 eps)
Fiona O'Shaughnessy
Jessica Hyde (12 eps)
Alexandra Roach
Becky (12 eps)
Nathan Stewart-Jarrett
Ian Johnson (12 eps)
Oliver Woollford
Grant Leetham (12 eps)
Alistair Petrie
Geoff Lawson (12 eps)
Ruth Gemmell
Jen Dugdale (9 eps)
Emilia Jones
Alice Ward (8 eps)
Geraldine James
Milner (8 eps)
Anna Madeley
Anya Levchenko (6 eps)
James Fox
The Assistant (6 eps)
Paul Ready
Lee (6 eps)
Sylvestra Le Touzel
Leah Gorsand (6 eps)
Stephen Rea
Conran Letts (5 eps)
Ian McDiarmid
Anton (5 eps)
Michael Maloney
Christian Donaldson (3 eps)
Simon McBurney
Professor Donaldson (3 eps)
Gerard Monaco
Joe (3 eps)
Emil Hostina
Marius (3 eps)
Eleanor Matsuura
Bev (3 eps)
Sarah Churm
Grant's Mum (3 eps)
Sacha Dhawan
Paul (2 eps)
Allan Corduner
Ross (2 eps)
Mark Stobbart
Bejan Chervo (2 eps)
Teresa Banham
Mrs. Ward (2 eps)
Mitchell Mullen
Monroe (2 eps)
Steven Robertson
Terrence (2 eps)
Dan Tetsell
Headteacher (2 eps)
Paapa Essiedu
Roy (2 eps)
Tim McInnerny
Airey Naeve (1 eps)
Corey Johnson
Niall (1 eps)
Kevin Eldon
Tony Bradley (1 eps)
David Calder
Dobri Gorski (1 eps)
Will Attenborough
Ben (1 eps)
Diana Hardcastle
CIA Woman (1 eps)
Alan Williams
Danny "The Tramp" (1 eps)
Michael Smiley
Detective Inspector Joshua Reynolds (1 eps)
Oliver Dimsdale
Greg Ashby (1 eps)
Tom Burke
Philip Carvel (1 eps)
Lloyd Hutchinson
William Kaye (1 eps)
David Sibley
Jack Tate (1 eps)
Rose Leslie
Milner (1 eps)
Anca Androne
Brosca (1 eps)
Ed Birch
The Assistant (1 eps)
Trystan Gravelle
Tom (1 eps)
Kevin Trainor
Mr. Omida (1 eps)
Clive Wood
Dr. Isherwood (1 eps)
William Belchambers
Christos (1 eps)
Vincenzo Ferrara
Mino Pecorelli (1 eps)
Aine Garvey
Young Jessica (1 eps)
Pixie Davies
Amanda (1 eps)
Diane Morgan
Tess (1 eps)
Juliet Cowan
Bridget (1 eps)
Candida Gubbins
Ben's Mum (1 eps)
Alex Lowe
Ben's Dad (1 eps)
Sope Dirisu
Roy (1 eps)
Gary Cargill
Detective Leeman (1 eps)
Simon Farnaby
Marcus (1 eps)
Hermione Gulliford
Diane (1 eps)
Stewart Scudamore
Milton Wilson (1 eps)
Gavin Spokes
Large Man (1 eps)
Danny Kirrane
Clerk (1 eps)
Andrew Readman
Lawyer (1 eps)
Ben Bishop
Corporal (1 eps)
Jay Simpson
Detective Richmond (1 eps)
Steve Leighton
MI6 Agent (1 eps)
Harley Rooney
Young Arby (1 eps)
Mason Rooney
Young Arby (1 eps)
Velile Tshabalala
Shenley Nurse (1 eps)
Michael Yare
Soldier (1 eps)
Ian Porter
Scientist (1 eps)
Lorna Gayle
Midwife (1 eps)
David Quilter
Danny Gorsand (1 eps)
Solomon Mousley
Holding Facility Guard (1 eps)