Why Why why do they keep doing this? BBC TV programmes

I used to enjoy this series, it happens now with the Antiques Roadshow too.

Why Oh Why do they keep announcing ahead of the show that they have discovered XYZ, What is the point of watching the paper trail if you know the result….

http://www.msn.com/en-gb/news/uknews/missing-rubens-masterpiece-found-hanging-in-a-historic-house-in-glasgow/ar-AAsp7Oo?ocid=spartandhp

The painstaking manner in which the overpaint and centuries of residue will be told in this week’s episode of the BBC series Britain’s Lost Masterpieces.