S4E1
The Darkest Hour (1)
Merlin
calendar_todayOct 1, 2011
schedule44 min
star7.8
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.
broadcast_on_home Networks
BBC One
star 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
Eoin Macken
Sir Gwaine
Katie Moore
Drea
James Greene
Ferryman
Gemma Jones
The Cailleach
Zee Asha
Audrey