Merlin Season 4
Genre: Medieval, Fantasy
Broadcast network: BBC
Broadcast period: October 1, 2011
Air time: Saturdays
Merlin is a young wizard who arrives in the kingdom of Camelot after his mother arranges for him to stay with the court physician, Gaius. He discovers that the king, Uther Pendragon, has outlawed magic and imprisoned the last great dragon deep under the kingdom. The dragon tells Merlin that he plays an important role: to protect Uther's son, Arthur, who will bring forth a great kingdom. When Merlin meets Arthur, he believes that he is an arrogant bully and Arthur, likewise, has a less than stellar opinion of Merlin. Merlin must keep his magic secret or face being executed by Uther.
Morgana is Uther's ward with the power of prophetic foresight, which frightens her and which she keeps secret. Guinevere, whom she calls "Gwen", is her maid and close friend. The first series focused on the development of Merlin and his friendship with Arthur, while the second series focused more on the development of the other cast members. Some of the later series' central themes are Morgana's struggle to control her powers and her eventual corruption to evil because of Uther's actions, as well as the maturation of Arthur to become the great king of legend and his blossoming romance with Gwen. A year later, Morgana returns darker and more powerful than ever before. At the start of the fourth season, she learns about Merlin's identity as Emrys and Merlin finds himself powerless against the spirits of the dead that Morgana summons.
Other characters from Arthurian legend have also appeared. Lancelot longed to become a knight but was unable to do so because of his birth as a commoner. Mordred has appeared as a Druid boy who formed a bond with Morgana (in the legend he is her nephew), and it has been predicted by the Great Dragon that Mordred will cause Arthur's death (in the legend this occurred at the Battle of Camlann). Mordred and occasionally the Great Dragon refers to Merlin by his Druidic name, Emrys (the Welsh form of Ambrosius); Ambrosius Aurelianus was a historical figure that Geoffrey of Monmouth partially merged with Merlin. Excalibur is an ordinary sword that becomes enchanted by the Great Dragon and is later thrown into a lake (in the legends, this was the sword Nimueh gave to Arthur).
After an attack on Camelot by the corrupted Morgana and her sister Morgause, the sword is struck into a rock by Merlin to keep it out of mortal hands.
In season 4, with Uther a shadow of his former self and unable to rule Camelot, it comes up to Merlin and Arthur to protect the kingdom from any possible threat and enemy. Meanwhile, Morgana continues to take revenge on Camelot and Agravaine, a relative of Arthur, arrives to support him but is he a relative to be trusted?
Colin Morgan as Merlin
Angel Coulby as Gwen
Bradley James as Arthur
Katie McGrath as Morgana
Anthony Head as Uther Pendragon
Richard Wilson as Gaius
Nathaniel Parker as Lord Agravaine
John Hurt as Kilgharrah the Great Dragon (voice only)
Santiago Cabrera as Sir Lancelot
Eoin Macken as Sir Gwaine
Rupert Young as Sir Leon
Tom Hopper as Sir Percival
Adetomiwa Edun as Sir Elyan
Emilia Fox as Morgause
David Schofield as King Alined
Laura Donnelly as Freya
Caroline Faber as Hunith
Asa Butterfield as Mordred
Warwick Davis as TAe
Georgia Moffett as Lady Vivian
Harry Melling as Gilli
Michelle Ryan as Nimueh (implied on her BBC profile)
Alice Patten as Ygraine Pendragon
Credits to: Wikipedia