BBC’s Merlin drama series will conclude its five-year run tonight with the epic finale episode “The Diamond of the Day.” Are you ready to say goodbye?

For five series we have followed Merlin, Arthur, Guinevere, Morgana, Gaius and the rest of the Camelot crew as they faced down a variety of evil sorcerers, grotesque monsters, and sometimes even each other in their quest to secure the future of Camelot and Albion.

Merlin went from a happy, naive young boy to a powerful (and rapidly aged?) sorcerer ready to stand at Arthur’s side and do whatever he can to protect him from his fate. Arthur went from a spoiled prince to a just and honourable king. Gwen went from servant to queen, while Morgana went from the king’s ward and Arthur’s friend/sister to a High Priestess of the old religion and Arthur’s mortal enemy.

Tonight, the characters we have come to know and love will make their final stand – at Camlann, the place in which legends say that King Arthur was killed by Mordred. Will Merlin‘s Arthur meet the same fate, or will Merlin/Emrys find a way to prevent destiny and help Arthur lead Albion into the golden age which was promised?

This is it. The final chance to share your theories, thoughts and speculation about what will happen next on Merlin. After tonight, all that is left is to reflect back on the story, and decide whether it concluded in a satisfactory way.

Watch a final sneak peek, in which Gaius and Gwen see Emrys appear on a hill, Gandalf-style, and Gaius says that he is somebody who deserves their gratitude:

Is Emrys in fact Merlin’s Final Form? Will Arthur survive? Is Gwen pregnant? Will Morgana die? What about the knights, and Gaius? Will they all reincarnate as dragons? So many questions!

At 20:15 GMT, we will have our answers. Don’t miss “The Diamond of the Day, Part 2” – and check back to Hypable for all of our reactions and Month of Merlin articles. And above all else: enjoy!