Giles Coren and guests are in the studio for an Agatha Christie special. Kenneth Branagh talks about directing and starring in the blockbuster remake of the Christie classic Murder on the Orient Express. Nikki Bedi heads to the debating chamber of County Hall in London to take part in an immersive theatre revival of Witness for the Prosecution. Sarah Phelps is one of the guests on the sofa and Father John Misty performs live in the studio.