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The Best Episodes of Merlin Season 4

Every episode of Merlin Season 4 ranked from best to worst. Discover the Best Episodes of Merlin Season 4!

Binge this in 9h 24m·Peaking at 8.9/10
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Episode Rankings

  1. #1 Fan Favorite
    Merlin Season 4 Episode 13 - The Sword in the Stone (2)
    8.9/10(968 votes)

    S4:E13

    Morgana and Helios have successfully captured Camelot, and Merlin and Arthur are outlaws on the run, in the last episode in this season of Merlin. Trapped in Ealdor with a ruthless army closing in, their situation becomes desperate. Arthur must take control before Camelot is lost forever… But faced with Agravaine’s betrayal and the strength of Morgana’s force, the young King has lost his conviction. Only Merlin can restore his faith, and only an extraordinary act can prove to the King that he was born to rule. Will the young warlock convince Arthur before his dreams of Albion fall to pieces?

    Director:Alice Troughton
    Writer:Julian Jones

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  2. Merlin Season 4 Episode 2 - The Darkest Hour (2)
    8.8/10(1061 votes)

    S4:E2

    The kingdom is on the brink of collapse and Morgana poised to strike, in the final part of this opening episode of the fantasy drama. 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 could anticipate the sacrifice Arthur intends to make there. Friendship and loyalty are tested to the limit, but in the end, it's the power of love that changes all their lives for ever.

    Director:Alice Troughton
    Writer:Julian Jones

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  3. Merlin Season 4 Episode 1 - The Darkest Hour (1)
    8.6/10(1203 votes)

    S4:E1

    Evil sorceress Morgana summons mighty gatekeeper the Cailleach, who opens a door to another world from which hellish creatures pour forth. As Arthur and his loyal knights take up arms, Merlin discovers the only thing that will stop them is an unimaginable sacrifice.

    Director:Alice Troughton
    Writer:Julian Jones

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  4. Merlin Season 4 Episode 12 - The Sword in the Stone (1)
    8.6/10(929 votes)

    S4:E12

    Morgana is now the head of a vast Southron army and a deadly net is closing around Camelot. After the sorceress strikes everyone is forced to run for their lives including Arthur. It is down to Merlin to try and save Arthur from Morgana's clutches.

    Director:Alice Troughton
    Writer:Jake Michie

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  5. Merlin Season 4 Episode 6 - A Servant of Two Masters
    8.5/10(1043 votes)

    S4:E6

    Merlin becomes a deadly weapon in Morgana's fight for supremacy when he falls into her hands. By recurring to ancient magic, she manages to turn friend against friend and creates the perfect assassin out of the young sorcerer which puts an oblivious King Arthur in great danger. Will anyone notice Merlin's unusual behaviour before he is able to do any serious harm to the King?

    Director:Alex Pillai
    Writer:Lucy Watkins

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  6. Merlin Season 4 Episode 3 - The Wicked Day
    8.4/10(966 votes)

    S4:E3

    The mighty citadel is buzzing in anticipation of the Prince's birthday celebrations, as the fantasy drama continues. But Arthur's old adversary, Odin, promises to ensure this is one party Camelot will never forget - for among the assembling guests lurks a deadly assassin set to strike. As the dust settles, Camelot is left devastated. Just how far is Merlin prepared to go to put things right; would he really risk everything and reveal his secret?

    Director:Alice Troughton
    Writer:Howard Overman

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  7. Merlin Season 4 Episode 7 - The Secret Sharer
    8.2/10(888 votes)

    S4:E7

    Morgana joins forces with enigmatic wizard Alator to uncover a secret that could change the course of destiny, as the magical drama continues. With allies on both sides of the castle walls, can anyone stop her before Merlin's greatest secret is revealed?

    Director:Justin Molotnikov
    Writer:Julian Jones

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  8. Merlin Season 4 Episode 4 - Aithusa
    8.1/10(919 votes)

    S4:E4

    A mysterious visitor arrives in Camelot seeking a very special prize: a dragon's egg.

    Director:Alex Pillai
    Writer:Julian Jones

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  9. Merlin Season 4 Episode 5 - His Father's Son
    8.1/10(913 votes)

    S4:E5

    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.

    Director:Alex Pillai
    Writer:Jake Michie

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  10. Merlin Season 4 Episode 11 - The Hunter's Heart
    8.1/10(891 votes)

    S4:E11

    Morgana ends up discovering a powerful ally in the Southron warlord Helios and they come up with the perfect plan to bring Camelot to its knees. With Arthur preoccupied by the beautiful Princess Mithian, it ends up falling to an absent friend to raise the alarm.

    Director:Jeremy Webb
    Writer:Richard McBrien

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  11. Merlin Season 4 Episode 9 - Lancelot du Lac
    7.9/10(927 votes)

    S4:E9

    When Sir Lancelot returns from the dead, old feelings reignite, as the drama continues. Gwen must fight temptation before she commits an unspeakable act of betrayal; one that would destroy the legacy of Camelot forever. With heads and hearts thrown into turmoil, Merlin becomes suspicious. Can a man really defy death, or is there something more sinister at play?

    Director:Justin Molotnikov
    Writer:Lucy Watkins

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  12. Merlin Season 4 Episode 10 - A Herald of the New Age
    7.8/10(877 votes)

    S4:E10

    The Camelot Knights stumble across an eerie shrine deep in the forest, its chilling atmosphere betraying a dark history best left undisturbed, as the magical drama continues. But when Elyan ignores Merlin's warning, his actions spark a chain of events more frightening than anyone could possibly have imagined... Can a grievous wrong be put right? Or will past demons change the future forever?

    Director:Jeremy Webb
    Writer:Howard Overman

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  13. Merlin Season 4 Episode 8 - Lamia
    7.2/10(891 votes)

    S4:E8

    A mysterious illness draws Merlin to a distant village. But it soon becomes clear that there is more at stake than just his patients' well-being as something sinister turns the air sour. Far from home and with no-one to trust, Merlin becomes embroiled in a deadly game of cat and mouse. No longer sure who is the hunter and who is the hunted, can the young warlock survive long enough to uncover the truth?

    Director:Justin Molotnikov
    Writer:Jake Michie

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Season 4 Ratings Summary

"The Sword in the Stone (2)" is the best rated episode of Merlin season 4. It scored 8.9/10 from 968 votes. Directed by Alice Troughton and written by Julian Jones, it aired on December 24, 2011. This episode is rated 0.1 points higher than the second-best, "The Darkest Hour (2)".