With Arthur's forces outnumbered, Merlin arrives in his guise as the aged sorcerer to defeat Morgana's army with magic. Arthur kills Mordred but is wounded and rescued by ...

Merlin finds himself facing the future he's fought so long to avoid. ...

Merlin sees Mordred helping Kara, a wounded Druid with whom he was once in love, but agrees to keep it secret. Later Kara tries to kill Arthur and is sentenced to death, ...

Morgana captures Alator - her former ally who later sided against her - in order to find out the identity of the legendary warlock known to the Druids as Emrys (still una ...

Merlin relays his suspicions to Arthur and they shadow Guinevere as she goes to meet Morgana. Merlin learns from ancient priestess the Dochraid that the spell on the quee ...

Earnest young druid Daegal begs Merlin to come to his village and save his dying sister, but the boy leads him into a trap where he's left to die by Morgana. Arthur meanw ...

After Arthur is unseated from his horse, his saddle is shown to have been tampered with and stable groom Tyr Seward blamed. Imprisoned, he tells Merlin he saw the true cu ...

After visiting her father's grave, Guinevere is captured by Morgana and imprisoned in the infamous Dark Tower haunted by ghostly visions and screams. Merlin and Arthur le ...

The druid Osgar delivers the judgment of the disir to Arthur. ...

Arthur rescues an old lady accused of sorcery, who gives him a horn with which to summon the spirit world. Despite Gaius's warning, he uses it to briefly meet his father ...

Ruadan rescues his daughter but is fatally wounded in the process. Merlin and Arthur are route-marched to Morgana's wintry hide-out. Mordred shows them some kindness but ...

Arthur has been king for three years without incident, but now an expedition north to the land of Ismere, led by Gwaine and Percival, is captured by Morgana and fellow so ...

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 ...

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, temporar ...

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 ...

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 ...

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, gratefu ...

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 sid ...

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 ...

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 a ...

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 ...

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 ...

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 va ...

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 ...

The new queen of Camelot proves to be far crueler than Uther, who is made to watch from his dungeon as she slaughters innocents. Guinevere helps Sir Leon escape from pris ...

Arthur must journey alone to seek out an ancient sorcerer, the Fisher King, and retrieve a golden trident to prove his right to the throne. Morgana gives him an amulet, t ...

A young mystery man, Gwaine, helps Merlin and Arthur when outnumbered in a tavern fight, in which he is injured. They take him to recover at Camelot where he expresses hi ...

A shooting at a nearby college sends TC, Jordan, Drew and Amira into the field, where they assist Rick with a deadly situation. Scott implements a new training program an ...

TC and Jordan accompany a SWAT team on a raid and wind up with an emergency room full of sickened immigrants, including one with murderous intentions. Scott pulls a dream ...

When Jordan realizes the hospital is under cyber-attack, she leads the team in managing patient care as chaos ensues. Drew and Kenny treat a critical patient forcing Drew ...

When protestors descend on a funeral for a dear member of the night shift family, multiple veterans are injured and brought to San Antonio Memorial for treatment. A high ...

Kenny joins Drew at his MMA veteran's support group and finds himself in the fight of his life. Jordan and Cain treat casualties from a hotel fire while Shannon follows a ...