The Secret Sharer

The Once and Future King is the title of the seventh episode of the fourth series of merlin.

Plot
to be added

Cast

 * Colin Morgan as Merlin/Emrys
 * Bradley James as Arthur Pendragon
 * Angel Coulby as Guinevere
 * Katie McGrath as Morgana Pendragon
 * Anthony Head as Uther Pendragon
 * Richard Wilson as Gaius
 * John Hurt as the voice of Great Dragon
 * Rupert Young as Sir Leon
 * Tom Hopper as Sir Percival
 * Eoin Macken as Sir Gwaine
 * Adetomiwa Edun as Sir Elyan
 * Nathaniel Parker as Sir Agravaine
 * Katie Moore as Drea

Broadcast
to be added

Trivia
King Arthur is king from this episode onwards until he is overthrown by Agravaine in the season finale.

This episode will be one of the most fast moving episodes yet of Merlin, because it has to deal with the recurring plots of Morgana and Emrys, aswell as Arthur becoming King and the average plot of the week.