Cast in Order of Appearance: John Hurt (Voice of the Dragon), Colin Morgan (Merlin), Bradley James (Arthur), Angel Coulby (Gwen), Sophie Rundle (Sefa), Adetomiwa Edun (Sir Elyan), Rupert Young (Sir Leon), Richard Wilson (Gaius), Eoin Macken (Sir Gwaine), Tom Hopper (Sir Percival), Katie McGrath (Morgana), Liam Cunningham (Ruadan), Julian Glover (Lochru), Alexander Vlahos (Mordred), Lindsay Duncan (Queen Annis), Josette Simon (The Euchdag), Stephen McCole (Ragnor)
Written By: Julian Jones
Directed By: Justin Molotnikov
Ep: 54
Arthur's Bane, Part Two
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Katie McGrath (Morgana), Bradley James (Arthur), Colin Morgan (Merlin), Stephen McCole (Ragnor), Alexander Vlahos (Mordred), Sophie Rundle (Sefa), Richard Wilson (Gaius), Josette Simon (The Euchdag), Eoin Macken (Sir Gwaine), Liam Cunningham (Ruadan), Angel Coulby (Gwen), Rupert Young (Sir Leon), Adetomiwa Edun (Sir Elyan), Tom Hopper (Sir Percival)
Written By: Julian Jones
Directed By: Justin Molotnikov
Ep: 55
The Death Song of Uther Pendragon
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Bradley James (Arthur), Colin Morgan (Merlin), Jane Thorne (Valdis), Gordon Munro (Alrick), Richard Wilson (Gaius), Angel Coulby (Gwen), Rupert Young (Sir Leon), Adetomiwa Edun (Sir Elyan), Alexander Vlahos (Mordred), Eoin Macken (Sir Gwaine), Tom Hopper (Sir Percival), Anthony Head (Uther)
Written By: Howard Overman
Directed By: Justin Molotnikov
Ep: 56
Another's Sorrow
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Fintan McKeown (Odin), Katie McGrath (Morgana), Janet Montgomery (Princess Mithian), James Fox (King Rodor), Rupert Young (Sir Leon), Richard Wilson (Gaius), Colin Morgan (Merlin), Bradley James (Arthur), Angel Coulby (Gwen), Adetomiwa Edun (Sir Elyan), Eoin Macken (Sir Gwaine), Tom Hopper (Sir Percival)
Written By: Jake Michie
Directed By: Ashley Way
Ep: 57
The Disir
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Frances Tomelty (Niede), Sian Thomas (Atorloppe), Helen Schlesinger (Befelan), Andrew Tiernan (Osgar), Alexander Vlahos (Mordred), Bradley James (Arthur), Colin Morgan (Merlin), Eoin Macken (Sir Gwaine), Tom Hopper (Sir Percival), Adetomiwa Edun (Sir Elyan), Richard Wilson (Gaius), Rupert Young (Sir Leon), Angel Coulby (Gwen)
Written By: Richard McBrien
Directed By: Ashley Way
Ep: 58
The Dark Tower
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Angel Coulby (Gwen), Adetomiwa Edun (Sir Elyan), Rupert Young (Sir Leon), Tom Hopper (Sir Percival), Eoin Macken (Sir Gwaine), Katie McGrath (Morgana), Richard Wilson (Gaius), Colin Morgan (Merlin), Bradley James (Arthur), Kelly Wenham (Queen Mab)
Written By: Julian Jones
Directed By: Ashley Way
Ep: 59
A Lesson in Vengeance
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Bradley James (Arthur), Angel Coulby (Gwen), Colin Morgan (Merlin), Richard Wilson (Gaius), Rupert Young (Sir Leon), John Bradley (Tyr Seward), Eoin Macken (Sir Gwaine), Veronica Roberts (Gelda Seward), Tom Hopper (Sir Percival), Katie McGrath (Morgana), Tony Guilfoyle (Sindri), Zee Asha (Audrey), Alexander Vlahos (Mordred), Giles New (Guard)
Written By: Jake Michie
Directed By: Alice Troughton
Ep: 60
The Hollow Queen
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Alfie Stewart (Daegal), Rupert Young (Sir Leon), Angel Coulby (Gwen), Bradley James (Arthur), Colin Morgan (Merlin), Richard Wilson (Gaius), Katie McGrath (Morgana), John Shrapnel (The Sarrum), Eoin Macken (Sir Gwaine), Tom Hopper (Sir Percival), Alexander Vlahos (Mordred), Matthew Clancy (Albin), Mitch Benn (Gerin)
Written By: Julian Jones
Directed By: Alice Troughton
Ep: 61
With All My Heart
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Angel Coulby (Gwen), Tom Hopper (Sir Percival), Katie McGrath (Morgana), Bradley James (Arthur), Colin Morgan (Merlin), Alexander Vlahos (Mordred), Rupert Young (Sir Leon), Richard Wilson (Gaius), Maureen Carr (The Dochraid), Eoin Macken (Sir Gwaine)
Written By: Richard McBrien
Directed By: Alice Troughton
Ep: 62
The Kindness of Strangers
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Gary Lewis (Alator), Katie McGrath (Morgana), Bradley James (Arthur), Angel Coulby (Gwen), Colin Morgan (Merlin), Rupert Young (Sir Leon), Eoin Macken (Sir Gwaine), Richard Wilson (Gaius), Barry Aird (Beroun), Sorcha Cusack (Finna), Alexander Vlahos (Mordred), Tom Hopper (Sir Percival)
Written By: Richard McBrien
Directed By: Declan O'Dwyer
Ep: 63
The Drawing of the Dark
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Bradley James (Arthur), Alexander Vlahos (Mordred), Eoin Macken (Sir Gwaine), Colin Morgan (Merlin), Rupert Young (Sir Leon), Tom Hopper (Sir Percival), Alexandra Dowling (Kara), Richard Wilson (Gaius), Angel Coulby (Gwen), Katie McGrath (Morgana)
Written By: Julian Jones
Directed By: Declan O'Dwyer
Ep: 64
The Diamond of the Day, Part 1
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Peter Guinness (Ari), Katie McGrath (Morgana), Alexander Vlahos (Mordred), Colin Morgan (Merlin), Bradley James (Arthur), Tom Hopper (Sir Percival), Richard Wilson (Gaius), Eoin Macken (Sir Gwaine), Erin Richards (Eira), Rupert Young (Sir Leon), Angel Coulby (Gwen), John Lynch (Balinor)
Written By: Jake Michie
Directed By: Justin Molotnikov
Ep: 65
The Diamond of the Day, Part 2
Cast in Order of Appearance: John Hurt (Voice of the Dragon), Bradley James (Arthur), Rupert Young (Sir Leon), Colin Morgan (Merlin), Alexander Vlahos (Mordred), Katie McGrath (Morgana), Richard Wilson (Gaius), Angel Coulby (Gwen), Barry Aird (Beroun), Eoin Macken (Sir Gwaine), Erin Richards (Eira), Tom Hopper (Sir Percival)
