Hannah Khalique-Brown Saara Parvin Actor Alfie Friedman Gabriel Davies Actor Charlie J. Tinson GCHQ Analyst Actor Aysha Kala Amina Parvin Actor Edward Holcroft James Cox Actor Andrew Rothney Rich T Actor Brendan Purcell Ted Actor Jamie Muscato Finn Actor Yanina Hope FSB Lecturer Actor Ernest Gromov Yevgeny Actor Tom McKay Max K Actor Mark Rylance John Yeabsley Actor Simon Pegg Danny P Actor Alex Jennings David Neal Actor Maisie Richardson-Sellers Kathy F Actor Julie Barclay Sally J Actor Robert Cavanah Campbell Scott Actor Adrian Lester Andrew Makinde Actor Shazia Nicholls Mrs Rama Actor German Segal Vadim Trusov Actor Peter Kosminsky Director, Writer, Executive Producer Declan Lawn Writer Adam Patterson Writer Amelia Spencer Writer Noëlette Buckley Executive Producer Colin Callender Executive Producer Bob Jones Producer