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.

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 visit a church in Port Glasgow to investigate whether a mysterious work depicting Christ after the crucifixion could be a lost masterpiece by one of the great painters of Northern Renaissance art.

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?

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?

When Ian and Julie moved into their Surrey cottage nearly 20 years ago, they discovered a curious wall painting in one of the bedrooms. They had no idea who put it there. Julie wanted to get rid of it as it didn't match her decor plans, while their four-year-old wanted to colour it in with her crayons.

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.

Fiona Bruce and Philip Mould investigate a delicate sketch depicting a mother and child, purported to be by one of the modern art world's most famous names, Amedeo Modigliani. Its owner, Henrietta Sitwell, inherited the work and always believed it to be genuine. However, a leading auction house recently cast doubt on its authenticity. If the work is genuine, it could be worth up to £100,000. If not, just a few hundred.

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?

Fiona Bruce, Philip Mould and the team help Americans Kim and Chuck, who believe their landscape painting is by one of the founders of Impressionism, Alfred Sisley, building a case to prove its authenticity. Kim and Chuck bought the work at auction near Chicago and believe it to be genuine. However, the painting was turned down nearly 10 years ago by the authentication committee, so the team will have to find new evidence to persuade them to change their mind.

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.

The tables end up being turned on Philip this week when one of his own pictures are put under the microscope.

Fiona and Philip attempt to help a man who believes he owns a painting by French post-impressionist Edouard Vuillard.

Fiona and Philip attempt to prove that two paintings are missing works by one of the country's best-loved artists, John Constable.

Fiona and Philip attempt to help Martin Lang try and prove the painting he bought in 1992 is by modern master Marc Chagall.