In the penultimate episode of the series, Della's life takes a major turn for the worse. Having quarrelled with Sadie, her best friend seeks out Elfryn, who confides to her that he's made a major discovery regarding the authenticity of one of the Museum's most valuable paintings.

• Fflur Dafydd

• Samuel Morgan-Davies
• Scott Rose-Marsh
• Steffan Cennydd