Here it is, the penultimate episode for the Pendragons (sorry, I couldn’t resist). In “The Diamond of the Day, Part One”, Arthur’s army heads into battle at Camlan against Morgana’s dark army. With Mordred assisting her with a vengeful agenda, Morgana seems more powerful than ever. How can Merlin ever hope to uphold the prophecy’s best outcome in the face of such strong magic? Our favorite program is determined to give us an explosive finale, but I will reserve most of my judgment until the final episode airs.