Nick struggles to adjust to life post-Novichok; Tracy learns that the contamination radius may be even bigger than last time; and the poisoning proves fatal for Dawn Sturgess.
Director:
Saul Dibb
Cast:
Anne-Marie Duff
Rafe Spall
MyAnna Buring
Mark Addy
Annabel Scholey
Johnny Harris
Stella Gonet
Clare Burt
Darren Boyd
Jill Winternitz
Wayne Swann