Jeremy and Judith have recently purchased a remote country mansion, but when they arrive to start the refurbishment, they are shocked to find the previous owner shot dead at the kitchen table, clutching a unique key in his hand. Caron calls in Jean to help determine the key's significance within a house full of antiques, but even Jean is surprised by what it unlocks.

• Sally Lindsay

• Alaïs Lawson
• Peter Gaynor
• Olivia Caffrey