Colin Morgan
Merlin (13 eps)
Angel Coulby
Gwen (13 eps)
Bradley James
Arthur (13 eps)
Katie McGrath
Morgana (13 eps)
Richard Wilson
Gaius (13 eps)
John Hurt
The Great Dragon (voice) (13 eps)
Sophie Rundle
Sefa (2 eps)
Erin Richards
Eira (2 eps)
Liam Cunningham
Ruadan (2 eps)
Stephen McCole
Ragnor (2 eps)
John Bradley
Tyr Seward (2 eps)
Alexandra Dowling
Kara (1 eps)
Gary Lewis
Alator (1 eps)
Julian Glover
Lochru (1 eps)
James Fox
King Rodor (1 eps)
Lindsay Duncan
Queen Annis (1 eps)
Jane Thorne
Valdis (1 eps)
Gordon Munro
Alrick (1 eps)
Fintan McKeown
King Odin (1 eps)
Janet Montgomery
Princess Mithian (1 eps)
Frances Tomelty
Niede (1 eps)
Sian Thomas
Atorloppe (1 eps)
Helen Schlesinger
Befelan (1 eps)
Andrew Tiernan
Osgar (1 eps)
Kelly Wenham
Queen Mab (1 eps)
Veronica Roberts
Gelda Seward (1 eps)
Tony Guilfoyle
Sindri (1 eps)
Zee Asha
Audrey (1 eps)
Giles New
Guard (1 eps)
Alfie Stewart
Daegel (1 eps)
John Shrapnel
The Sarrum (1 eps)
Matthew Clancy
Albin (1 eps)
Mitch Benn
Gerrin (1 eps)
Maureen Carr
The Dochraid (1 eps)
Barry Aird
Beroun (1 eps)
Sorcha Cusack
Finna (1 eps)
Peter Guinness
Ari (1 eps)
John Lynch
Balinor (1 eps)