Fake or Fortune? Series 12

American artist Jeffrey Kroll believes his flower picture is by one of the pioneers of abstract art, Piet Mondrian. Can the team help him build a case and prove its authenticity?

Artist and dealer David Taylor believes his saleroom punt is a work by one of Canada’s most celebrated impressionists, Helen McNicoll. Can the team help prove it's the real thing?

The team delve into the world of music memorabilia when they investigate a piano linked to John Lennon and a guitar with a connection to Ronnie Wood, but are they the real deal?

Owner Sally Green believes her landscape painting is by one of the forefathers of impressionism, Jean-Baptiste-Camille Corot. Can the team gather new evidence to prove its authenticity?