7/7. Diarmuid Gavin 's 21st-century garden is a contemporary design that draws inspiration from creations showcased in previous episodes. As a nation of passionate gardeners, we're as likely to plunder the past for ideas as the present. Jane Owen sees how fashions repeat and evolve, ponders the role of the modern-day plant hunter and predicts how gardens may look in the future. Director Richard Wallis ; Series producer Hannah Wyatt RT DIRECT: Gardens through Time book is £20 (RRP £25) inc p&p. To order call [number removed] (national rate)