Fiona and the team return to the beautiful grounds of the Royal Botanic Garden Edinburgh, where finds include a stunning set of traditional Highland dress that once belonged to a clan chieftain and a rare Rolex Sea-Dweller watch.

Siobhan Tyrell is thrilled to see a selection of medals awarded to pioneering diver Verrall Newman, including a 1924 Olympic participant's medal, while Susan Rumfitt hears the poignant story behind a Norwegian bridal brooch. Ronnie Archer Morgan admires a 19th-century bust of a young black man by Scottish sculptor Thomas Stuart Burnett, while Lisa Lloyd appraises a large decorative Suzani textile from Central Asia.

Alastair Dickenson is intrigued by a silver trophy in the shape of a ram's head, awarded to the winner of a one-mile bicycle race in 1897 – but what was the curious object's original purpose? Fiona gets the chance to take a closer look at a plant specimen collected by Charles Darwin during his voyage on HMS Beagle, and Theo Burrell challenges her to put a selection of ceramic piglets by the Wemyss firm in order of value.

Antiques Roadshow is at Dyffryn Gardens near Cardiff in south Wales. Will Farmer is thrilled to see a huge collection of Clarice Cliff
ceramics, including many rarities picked up for just a few pounds, while Hilary Kay is amused by a toy figure of a fire-breathing mother-in-law that shoots real sparks.

Alastair Chandler is intrigued by a 1960s ‘Atmos' clock that runs on air, and Lisa Lloyd admires an ornate Welsh harp, getting to hear it played by a musician who is keeping the art alive. Hilary meets former Welsh tennis player Elizabeth James and sees some of the dresses she wore in the 1960s. Marc Allum, meanwhile, is fascinated by a ship's travel chest stencilled with the evocative name ‘Empire Windrush' – but how did it end up gathering dust in a barn in Wales?