In this episode, John enjoys the splendour of Osborne House, Queen Victoria and Albert's seaside palace on the Isle of Wight. Meanwhile, Keeley meets the team searching for natural solutions to problematic invasive plant species, Joe Crowley investigates what dry summers mean for wildlife, rivers and water supplies, and Greg McKenzie participates in one of the more unusual events put on by the country's heritage sites to keep people visiting. Paul discovers how to create a perfect garden hideaway, and the programme provides top picks for coastal walks.