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?

Fiona and Philip take a look at a painting they think is an unrecognised work by Monet. They then try to persuade different luminaries from the art world to believe them.

Fiona and Philip take a look at a painting which could be a piece of work by 19th-century American artist Winslow Homer and was discovered at a rubbish tip.

The team try to prove the authenticity of a suspected lost masterpiece by Paul Delaroche.

Is a purchase from an online auction site a lost work by Australian artist Tom Roberts?

The team try to find out whether a painting is a lost masterpiece by John Constable.

A sculpture found at a car-boot sale in Essex bears striking similarities to the work of Elisabeth Frink. Can the team prove it’s part of an edition sculpted by her in the 1950s?

Fiona and Philip take a look at the career of forger Han van Meegeren, who managed to fool galleries and buyers in the early 20th century with his fake pieces by Old Masters.

Fiona and Philip stop the auction of a painting that used to be a German national treasure but was stolen from it's Jewish owners by the Nazis during the Second World War. They then follow the story as it is discovered whether it is the work of Rembrandt.

Fiona and Philip are at a church in Lancashire, once patronised by Yorkshire's famous Bronte sisters, that is the home of a painting thought to have been made by an Italian old master.

The team investigate a portrait which may have been one of Lucian Freud's first creations.

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?

Fiona and art experts Philip Mould and Bendor Grosvenor attempt to help a man who has inherited three paintings supposedly by LS Lowry.

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?

Fiona and Philip attempt to help Under-Sheriff and Secondary of London Charles Henty find out whether two paintings in his possession are as valuable as he believes.

Featuring works claimed to be by Willem de Kooning, Philip Mercier and Adolph von Menzel.

Nicky Philipps needs help in determining whether a mysterious painting housed at Picton Castle in Pembrokeshire is a genuine piece of work by French Impressionist Pierre Auguste Renoir.

A sketch of a dancer believed to have been drawn by Auguste Rodin is investigated.

The team examine two pictures believed to be by Paul Gauguin, a giant of 19th-century art.

Could two simple sketches be by great French artists Pissarro and Cezanne? The team set out to gather evidence to prove they’re genuine.

A painting bought from an online auction in Monaco described as 'in the style of Sir Joshua Reynolds' looks promising, but could something murkier be lurking beneath the paint?

Could a mysterious canvas covered in white paint be hiding a lost painting by one of the most important painters of the 20th century, Armenian-American artist Arshile Gorky?

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?

Fiona and Philip examine a painting that owner Patrick Rice thinks is by Edgar Degas. If its genuine, it could be worth about £500,000. They trace the artwork back through time to find out whether it really was created by one of France's greatest artists.

Fiona and Philip take a look at the history of three paintings bequeathed to the National Museum of Wales after their owner died in 1951. It was always thought that the paintings were by landscape artist JMW Turner, but only months after the museum took ownership, experts said that they were fakes.