In series 4, Uther is wounded during an assassination attempt on Arthur. Merlin tries to heal him but due to Morgana's meddling, the spell instead kills him. In the television series Camelot, Uther is poisoned by his daughter Morgana in the first episode.
Morgana catches up with Merlin and Arthur and drives their horses away, but she is killed by Merlin wielding Excalibur. Without horses, Merlin cannot get Arthur to the Isle in time, and the King of Camelot dies in Merlin's arms, after thanking his friend for everything he has done.
Arthur died at the hands of Mordred by the shores of Avalon, but, as the Once and Future King, he is destined to one day rise again.
As it was, in Arthur's eyes, after being indoctrinated for his entire life to believe that magic is evil, his father's death - by magic - only reaffirmed his beliefs.
It seemed that Gaius actually did die but Merlin arrived and, enraged by the death of his friend and mentor, slew Nimueh. In killing Nimueh, Merlin restored balance to the world, mastering the power of life and death and reviving Gaius.
And yet, in the end, Arthur kills Freya—and kills her knowing that her true form is a young girl. The episode tries not to think about it—it keeps the knowledge from Merlin, for one thing—but coming on the heels of the Morgause episode, it implies disturbing things about Arthur's own arc.
Merlin spends a part of his life as a madman in the woods and marries a woman named Guendoloena (a character inspired by the male Gwenddoleu ap Ceidio). He eventually retires to observing stars from his house with seventy windows in the remote woods of Rhydderch.
In the Tavola Ritonda, Camelot is abandoned and falls to ruin after the death of Arthur.
The wizard creates a green gem out of one of Nimue's tears which, upon dissolving in her mouth, causes her to remember the history between Merlin and herself. Nimue is horrified at how she betrayed Merlin, but Merlin forgives her.
Arthur again falls in love, and marries Guinevere, daughter of King Lodegrance of Camylarde. Guinevere's dowry included a round table and many knights. Arthur establishes his court at Camelot. The round table is a symbol of equality amongst his knights, for no knight was seated in a position superior to another.
Following the death of Arthur, Guinevere entered a convent, where she spent the rest of her life praying and helping the poor. Filled with remorse for the trouble she and her lover had caused, she vowed never to see Lancelot again. When Guinevere died, she was buried beside King Arthur.
Mordred as a young boy keeps calling Merlin "Emrys", which is actually Merlin's name as a Celtic druid and sorcerer. In Welsh, Merlin's full real name is actually Myrddin Wynn Emrys. Myrddin is his first name, Wynn is his family name and Emrys is his druid name.
It would have been perfectly satisfying to see Merlin become free, and to know that he and Arthur would continue on their adventures — as equals this time — after the show was over. But the fact that Merlin himself only gets a small taste of this deeply-hoped-for-future is what makes it so painful.
Morgana Pendragon, also known as Morgana, is the main antagonist of the BBC series, Merlin. She is the illegitimate daughter of Uther Pendragon and the half-sister of Arthur Pendragon and Morgause.
Morgana married Merlin. Merlin was born in 603. They had one son: Arian Pendragon.
When Mordred's love interest Kara was captured and executed by Arthur, Mordred decided to turn against Camelot and ally himself with Morgana, revealing Merlin's true identity to her. Mordred succeeded in mortally wounding Arthur during the Battle of Camlann, but was ultimately killed by him in the process.
She was devoted to Lancelot (her lover) and her betrayal of her husband created the end of King Arthur's roundtable and the downfall of Camelot. Thomas Malory described Guinevere as 'a true lover' and believed she had a 'good end. '
Gaius was Merlin's mentor and guardian throughout the series, and as such they shared a very close and familial relationship. They quickly came to view one another as father and son and maintained a very close bond even after Merlin met his real father, Balinor, in the series 2 finale.
In series 4, Uther is wounded during an assassination attempt on Arthur. Merlin tries to heal him but due to Morgana's meddling, the spell instead kills him. In the television series Camelot, Uther is poisoned by his daughter Morgana in the first episode.
When Launcelot hears of the death of Arthur and Gawain, he comes to England in haste. He looks for the queen and finds her in a nunnery. For love of Guinevere as much as for remorse he takes on the habit of a priest. Guided by visions, he goes to Almesbury, where he finds Guinevere dead.
Arthur is mortally wounded by his brother-son, Mordred, who stabs him in the head with his sword. Arthur is placed in a boat and floated down the river toward Avalon. It is intended that Arthur will receive healing there; however, Arthur is never heard from again.
Weapons, Outfits, Kit items, Trinkets, Talismans, Valuables, and Documents all transfer over to John in the post game. Character progress, such as known recipes and completed challenges also carry over into endgame play, although core stat progress is reduced to 6/8 bars again.
Guinevere is childless in most stories. The few exceptions of that include Arthur's son named Loholt or Ilinot in Perlesvaus and Parzival (first mentioned in Erec and Enide).
Bradley James says in an interview that his character Arthur's friendship with Merlin is stronger than his love for Gwen. Alexander Vlahos said in an interview that “becomes a love story between two men. In a platonic sense, it becomes a brilliant love story between Arthur and Merlin.”
Though their courtship was complicated by their differing social classes (and later by interference from Morgana), they were ultimately married in the final episode of series 4. As of Arthur's death in the series finale, Gwen is now his widow and rules Camelot in his stead.