Barb is an organization that tracks television viewing numbers and data in the UK. It collects information about what shows people watch on television and online to provide broadcasters insights into popular programming. This allows broadcasters to charge more for advertisements during highly viewed shows and determine when to air their most in-demand content. Barb's data showed that the three highest viewed shows were Death Comes to Pemberly, Agatha Christie, and Midsomer Murders, which were estimated to appeal most to middle-aged and elderly audiences.