The Darkest Hour (1)

Synopsis

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.

Guest stars

Anthony Stewart Head

Uther Pendragon

Emilia Fox

Morgause

Santiago Cabrera

Sir Lancelot

Tomiwa Edun

Sir Elyan

Tom Hopper

Sir Percival

Rupert Young

Sir Leon