The Centenary

S1 E4: Other than the iconic filming location of Downton Abbey, Highclere Castle has a huge amount of its own history to celebrate. The great-grandfather of the current Lord Carnarvon discovered the tomb of Tutankhamen 100 years ago. To mark the occasion the castle throws a party. But the basement’s Egyptian museum needs to be spruced up and this treasure trove requires very special cleaning techniques.