Sisley (S10E03)

Fiona Bruce, Philip Mould, and their team assist American couple Kim and Chuck in their quest to authenticate a landscape painting they believe to be the work of Impressionist pioneer Alfred Sisley. Purchased at an auction near Chicago, the couple is convinced of its authenticity. However, the painting was previously rejected by an authentication committee almost a decade ago, so the team faces the challenge of uncovering fresh evidence to sway the committee's decision and validate the artwork's true origin.