First Verse and Chours:
Uther/Irgiane/Arthur : Father, Mother, and Son
Second Verse and Chours:
Arthur/Uther : Father and Son
Third and Last:
Morgana/Uther: Ward and Father
Morgana/Arthur : Brother and Sister
There is no Cornelius Sigan! There is soul of Nimueh in the glass heart!
And there are a lot of Merlin's memories and hallucinations.
Footage from: BBC's 'Merlin'(series 1 & 2).
Music: Apocalyptica feat. Adam Gontier - I Don't Care