The Darkest Hour
The veil between the underworld and the world of the living
is torn open, unleashing hellish creatures on Camelot.

The Darkest Hour II
Arthur (Bradley James) intends to make the ultimate sacrifice
in order to vanquish the Dorocha.

The Wicked Day
A sinister circus troupe hired by an old enemy of Camelot
infiltrate Arthur's (Bradley James) birthday celebration.

Aithusa
Merlin (Colin Morgan) learns of the existence of a dragon's egg
from Gaius's (Richard Wilson) old pupil, Borden (James Callis).

His Father's Son
Arthur (Bradley James) feels the weight of being king when his
actions bring about a war with Queen Annis (Lindsay Duncan).

A Servant of Two Masters
Dark magic turns Merlin (Colin Morgan) into an assassin
whose target is Arthur (Bradley James).

The Secret Sharer
Gaius (Richard Wilson) is abducted by Alator (Gary Lewis)
as part of a plot to learn the identity of Emrys.

Lamia
The Knights aid Lamia (Charlene McKenna) unaware
she is actually a succubus.

Lancelot du Lac
Lancelot (Santiago Cabrera) is raised from death by
dark magic for a destructive purpose.

A Herald of The New Age
Elyan (Adetomiwa Edun) is possessed by the spirit
of a vengeful druid boy (Nicholas Croucher).

The Hunter's Heart
Princess Mithian (Janet Montgomery) tests the loyalty
of Arthur's (Bradley James) heart.

The Sword in the Stone
Camelot is overtaken, forcing Arthur (Bradley James)
and others to flee for their lives.

The Sword in the Stone II
Merlin (Colin Morgan) must find a way to help Arthur
(Bradley James) after betrayal and powerful enemies
leave the king with doubt.