Morgana takes the dying Morgause to the Isle of the Blessed where she unwittingly tears the veil to the spirit world, unleashing the Dorocha, invisible ghosts that begin to attack the kingdom. At Camelot, where a weakened Uther has given over much of his rule to his scheming brother Agravaine, Merlin senses what is happening but finds his magic inadequate to stop it. As Camelot fills with refugees, Gaius reasons that, as one death opened the portal, only another will close it. Arthur offers himself as the sacrifice and travels to the Isle of the Blessed with Merlin and a group of young knights. Here, after Arthur has finally praised him for his bravery, Merlin appears to have a fatal encounter with one of the Dorocha. Written by don @ minifie-1

The kingdom is on the brink of collapse, with Morgana poised to strike. As Lancelot races back to Camelot with the dying Merlin, Arthur must continue on his mission to vanquish the Dorocha without them. Though the knights know their journey to the Isle of the Blessed is fraught with danger, none anticipate the sacrifice Arthur intends to make there. Friendship and loyalty are tested to the limit, but in the end, it is the power of love that changes all their lives forever. Written by BBC

The mighty citadel is buzzing in anticipation of the prince's birthday celebrations, but Arthur's old adversary, Odin, promises to ensure this is one party Camelot will never forget, for amongst the assembling guests lurks a deadly assassin, set to strike. As the dust settles, Camelot is left devastated, but just how far is Merlin prepared to go to put things right? Would he really risk everything and reveal his secret? Written by BBC

The mysterious Julius Borden arrives in Camelot with news of a magical secret that threatens to change the landscape of the kingdom forever. He has located the final part of the key to the tomb of Ashkanar, an ancient mausoleum which holds a very special treasure: the last remaining dragon's egg. Merlin is understandably drawn in by Borden's news, and promises to help him, but just who is the enigmatic stranger and, more importantly, what does he really want with the egg? Written by BBC

Arthur faces his first true test as King when he incurs the wrath of the formidable Queen Annis. With the lives of thousands hanging in the balance, Arthur must find the strength to be his own man and become the leader Camelot so desperately needs. Written by BBC

When Merlin falls into Morgana's hands, he becomes a deadly weapon in her fight for supremacy. Using ancient magic, she pits friend against friend to create the perfect assassin. An oblivious Arthur is in great danger. Will anyone notice Merlin's unusual behaviour before he does the king some serious harm? Written by bbc

Morgana suspects Gaius knows the whereabouts of Emrys, the wizard she was told to fear. Agravaine renews his efforts to throw suspicion on the old court physician before Morgana has him kidnapped and tortured by sorcerer priest Alator (who eventually charms him into identifying Emrys as Merlin). Though Agravaine made it look as if Gaius fled, Merlin knows of Agravaine's duplicity. With Gwaine's help, he locates his old friend and, in the process, discovers an unexpected new ally. Once back at Camelot, Gaius and Merlin begin to wonder how they can convince the young king of his uncle's treachery. Written by don @ minifie-1

When the menfolk of Guinevere's home village fall victim to a mysterious illness, Gaius sends Merlin, along with Guinevere and the knights, to cure them, but they are side-tracked by a waif-like girl, Lamia. Only Merlin and Guinevere suspect, rightly, that she is a witch, and soon the knights fall under her spell, succumbing to the same sickness. Arthur rides out with Gaius, who has realized the girl's secret, but will they rescue Merlin and Guinevere or can Merlin defeat Lamia without revealing his magic powers? Written by don @ minifie-1

Learning from Agravaine that Arthur plans to wed Guinevere, Morgana uses necromancy to revive Lancelot, though he has no proper recollection of his past life and, grateful to Morgana, returns to Camelot to seduce the future queen. Guinevere resists, until she is presented with an enchanted bracelet supplied by Morgana for Lancelot to give her. The two meet in secret and are observed by Arthur. Merlin, suspicious of events, convinces Gaius of how the knight was resurrected, but can they stop Arthur from banishing Guinevere and putting Lancelot to death? Written by don @ minifie-1

The knights come across a shrine built on a site where Druids were massacred, and where a thirsty Elyan inadvertently desecrates it by drinking from its well. As a result he is possessed by a spectral boy who tells him his ghost can only rest if the perpetrator of the massacre is slain, bewitching him into trying to kill Arthur, son of Uther Pendragon, who murdered Druids. After two bungled efforts, Elyan is pursued by Arthur and Merlin back to the shrine where a surprise revelation leads to some hope for the restoration of the old ways. Written by don @ minifie-1

As Arthur celebrates his engagement to Princess Mithian to unite their countries, the banished Guinevere witnesses a raid on her village by warlord Helios and afterwards overhears him plotting with Morgana to invade Camelot. They will enter the stronghold through the siege tunnels, plans of which have been given them by Agravaine. She escapes to inform Merlin but refuses to see Arthur, who inevitably disbelieves his uncle's treachery when told of the plot. However he still has feelings for Guinevere and calls off his engagement to Mithian. Written by don @ minifie-1

As Morgana's forces capture Camelot, Arthur at last comes to see his uncle's treachery. He is reluctant to flee, but Merlin bewitches him into escaping with him, temporarily blocking his memory and dressing him as a peasant. Elyan, Gaius, and Gwaine are taken prisoner, though Morgana is impressed by Gwaine's performance in trials by combat. Separated from Leon and Percival, Merlin and Arthur fall in with smugglers Tristan and Isolde, during which Merlin's spell wears off and the young king can reveal his identity to them. The quartet escapes to Ealdor, Merlin's village, where a wounded Arthur is nursed by Guinevere as Agravaine and his army close in. Written by don @ minifie-1

Merlin summons the dragon to vanquish the pursuers and uses his magic to kill Agravaine. Hiding in the woods with Guinevere, Tristan and Isolde, Arthur confesses his self-doubt to Merlin and feels he has failed his subjects, but Merlin proves to him that he is worthy to be king by getting him to extract the legendary sword from its stone. In front of Leon and Percival and many other fugitives from the court, Arthur accomplishes the feat, inspiring them to claim back Camelot by entering through the same siege tunnels and freeing the prisoners. Finally, Camelot will be reclaimed after magic and sacrifice, and Guinevere will be proclaimed its queen. Written by don @ minifie-1