Peter Firth
as Harry Pearce
Hugh Simon
as Malcolm Wynn-Jones
Nicola Walker
as Ruth Evershed
Rupert Penry-Jones
as Adam Carter
Miranda Raison
as Jo Portman
Rory MacGregor
as Colin Wells
Hermione Norris
as Ros Myers
David Oyelowo
as Danny Hunter
Richard Armitage
as Lucas North
Raza Jaffrey
as Zafar Younis
Keeley Hawes
as Zoe Reynolds
Shauna MacDonald
as Sam Buxton
Matthew Macfadyen
as Tom Quinn
Shazad Latif
as Tariq Masood
Gemma Jones
as Connie James
Max Brown
as Dimitri Levendis
Simon Russell Beale
as William Towers
Alex Lanipekun
as Ben Kaplan
Olga Sosnovska
as Fiona Carter
Sophia Myles
as Beth Bailey
Esther Hall
as Ellie Simm
Lara Pulver
as Erin Watts
Geoffrey Streatfeild
as Calum Reed
Jenny Agutter
as Tessa Phillips
Graeme Mearns
as Jed Kelley
Lisa Faulkner
as Helen Flynn