Honeysuckle Weeks returns as Samantha Stewart, previously Foyle’s driver. Now that peace has been declared she dabbles in various jobs until she meets a brilliant mathematician called Adam, played by Max Brown, who has recently taken over a Hastings guest house and is desperately in need of help. Meanwhile Anthony Howell reprises his role as D.S. Milner, who has been promoted and is now working for Brighton police force.
Episode one, The Russian House, focuses on the return of the Cossacks to Russia once the war was over. In a secret codicil, signed in March 1945, the British agreed to the forced repatriation of all émigré Russians in the full knowledge that this would lead to their brutal executions.