The competition starts in Alnwick Castle in Northumberland - known to many as Hogwarts - where expert judges Lachlan Goudie and Daphne Todd OBE set their first challenge to see each artist's unique painting style for the first time. Eyebrows are raised as one artist starts by painting her whole canvas bright red whilst another paints what looks like a lion straddling a cannon. As paint is put to canvas Una and Richard learn what drives each artist's passion for painting - and what it would mean for them to win. The second challenge each week is a quick-draw challenge. In this episode the artists must sketch, at speed, a delphinium flower. Expert judge Lachlan Goudie shows us his tips on how to capture the beauty and complexity of a flower. Their final challenge is to paint the formidable castle from across the banks of the River Aln. Getting a sense of depth into their paintings proves more difficult than many think. While some thrive painting outdoors, others who've only ever painted in the comfort of their spare bedrooms have to adapt quickly to the challenges of the changing light. Una travels to the V&A museum in London to view one of the most famous landscapes - John Constable's The Hay Wain - and artist Fraser Scarfe tries to convince her that there's more to it than its chocolate-box reputation. Back in the castle, the judges take on the role of executioner as they have the difficult job of deciding which amateur artist won't see it through to the next week.