When Merlin's village is attacked by Kanan, a fearsome raider, Merlin rushes home to help - and is surprised when Gwen, Morgana and Arthur insist on coming with him.

It quickly becomes clear that the odds are stacked firmly against them. With dozens of lives at stake, Merlin's old friend William forces him to make a difficult choice. Is he prepared to use magic to save the village, and in doing so reveal his sorcery to Arthur? Or will his destiny to protect the future King lead him to keep his magic a secret, which may mean leaving his old friends to die..?

When Gwen's father is imprisoned for treason and killed at Uther's behest, Morgana decides she must take revenge.

Merlin is stunned to discover just how far she is prepared to go when he uncovers a plot to kill the King. Can the young sorcerer summon the courage to foil her plan, or is this one occasion when he should just sit back and do nothing? After all, his life would be much simpler were Uther not around.