Mark Addy

as Sgt John Rook

Maxine Peake

as WPC Kate McFay

Darren Boyd

as PC 'Puffy' Tromblay

Hattie Morahan

as WPC Julie Cardigan

Rhashan Stone

as Sgt Trev Ellington

Phil Davis

as CI Albert Custer

Tunji Lucas

as PC Jermaine Barrat

Joanna Horton

as WPC 'Tazer' Horton

Steve Money

as DS Gary Bliss

Cloudia Swann

as Susan Rook

Will Irvine

as Ray Edwards

Nila Aalia

as Dr Parvaz

Florence Hoath

as Sheena West

Danni Bennatar

as Florrie Rook