In this episode Dick and Angel give Jonny a crash course in the dos and don'ts of chateau shopping before he and his wife start the search for their own dream place. Jonathan and Michael, who are struggling to turn their magnificent French castle into a money-making venture, explore some of their chateau's caves in the hope of finding a buried fortune. And Phil and Angelina struggle to pitch their chateau as the perfect place for a 50th wedding anniversary party when they can't see eye to eye themselves.