“The Mark of Nimueh”[su_row][su_column size=”2/3″]
|First Aired:||4 October 2008|
|Written by:||Julian Jones|
|Directed by:||James Hawes|
|Guest Stars:||Michelle Ryan, David Durham, Rick English (voice only) and Leigh Stevenson (uncredited).|
|Filming locations:||Chistlehurst Caves and Penhurst Place|
A deadly plague spreads through Camelot. When it seems that sorcery can be the only possible explanation, Merlin and Gaius race to find a cure, while Gwen is arrested and sentenced to death for practicing witchcraft. Venturing deep beneath Camelot to unmask the true culprit, Merlin, Morgana and Arthur are faced with a terrifying beast, conjured by the evil sorceress Nimueh. Can they expose the truth before Gwen is executed?