Ruth Wilson Sarah Tucker Actor Emma Thompson Zoë Boehm Actor, Executive Producer Adeel Akhtar Hamza Actor Nathan Stewart-Jarrett Downey Actor Tom Goodman-Hill Gerard Actor Darren Boyd C Actor Tom Riley Mark Actor Adam Godley Joe Silverman Actor Sinead Matthews Denise Actor Ken Nwosu Rufus Actor Fehinti Balogun Amos Actor Aiysha Hart Paula Actor Steven Cree Bob Poland Actor Morwenna Banks Executive Producer Natalie Bailey Director Mick Herron Executive Producer Jamie Laurenson Executive Producer Hakan Kousetta Executive Producer Tom Nash Executive Producer