The final episode of the documentary features a tour of an extraordinary new home - Villa Troglodyte, which has come onto the market. Built as if carved out of the rock, the price is `only' £23million because it doesn't have a sea view. The pressure to build more houses in such a small country has left Prince Albert with a challenge. Cameras follow him as he attends meetings about a huge two-billion-euro land extension project he has initiated. Extending into the sea is a complex operation, but once complete the largest villas there are estimated to sell for around 100million euros.