Michael Kitchen returns to the screen for a final time as Detective Chief Superintendent Foyle, a man of scrupulous integrity who continues to be immersed in the dangerous world of espionage. Having survived the First World War and solved crime in Hastings during the Second World War, Foyle works as Senior Intelligence Officer for the secret service MI5 to keep England safe and bring justice to those who deserve it. Honeysuckle Weeks also returns to her role as Samantha Stewart, Foyle's trusted associate and ally who successfully navigates the shadowy world of intelligence and dedicatedly assists her former boss as he seeks to uncover the truth of the cases he investigates.