Merlin

Colin Morgan

Arthur Pendragon

Bradley James

Gwen

Angel Coulby

Uther Pendragon

Anthony Head

Gauis

Richard Wilson

Guest Star

Emilia Fox

Morgana

Katherine Elizabeth McGrath

Gaius

Richard Wilson

Morgana

Katie McGrath

Agravaine de Bois

Nathaniel Parker

Sir Lancelot

Santiago Cabrera

The Great Dragon (voice)

John Hurt

Guest Star

Duncan Meadows

Guest Star

Phil Davis

Guest Star

Steven Hartley

Guest Star

Terence Maynard

Guest Star

James Callis

Guest Star

Wayne Foskett

Guest Star

Maureen Carr

Guest Star

Ben Daniels

Guest Star

Rupert Young

Guest Star

Phil Holden

Geoffrey of Monmouth

Michael Cronin

Guest Star

Miranda Raison

Guest Star

Trevor Sellers

Guest Star

Gary Lewis

Guest Star

Melanie Hill

Cenred

Tom Ellis

The Cailleach

Gemma Jones

Guest Star

Adetomiwa Edun

Guest Star

Zee Asha

Sir Percival

Tom Hopper

Guest Star

Eoin Macken

Guest Star

Caroline Faber

Guest Star

Nicholas Croucher

Guest Star

Leander Deeny

Guest Star

Tom Meredith

Guest Star

Lindsay Duncan

Mordred

Asa Butterfield

Guest Star

Sarah Beck Mather

Guard

Rhys Rusbatch

Guest Star

Charlene McKenna

Guest Star

Janet Montgomery

Guest Star

Robert Maillet

Ygraine

Alice Patten

Drea

Katie Moore

Guest Star

James Greene

Guest Star

Gareth Jewell

Audrey

Zee Asha

Ferryman

James Greene

Rescued Child

William Rowlands

Rescued Child

Charlie Petryszyn

Rescued Child

Anya Davies

Sefa

Sophie Rundle

Alexander Vlahos

Director

David Moore

Director

Alex Pillai

Director

Ashley Way

Director

Jeremy Webb

Director

Justin Molotnikov

Director

Alice Troughton