In this episode, Dee visits Nigel and Vincent, who entertain visitors with a clarinet choir; she meets Mona, who is anticipating a visit from the Austrian Alan Titchmarsh; and she spends time with her nephew Tom Hart Dyke, who has risked life and limb looking for exotic plant specimens overseas. Dee also meets Sue and Earl as they open their eclectic north London garden - complete with home-made follies; and visits Julia and David's splendid garden that's adjacent to Warwick Castle. With Miranda's flowerbeds ready for planting, Dee also pops over to continue her mission to make a gardener of her daughter.