Merlin

Colin Morgan

Arthur Pendragon

Bradley James

Gauis

Richard Wilson

Gwen

Angel Coulby

Guest Star

Mackenzie Crook

Uther Pendragon

Anthony Head

The Great Dragon (voice)

John Hurt

Morgana

Katherine Elizabeth McGrath

Gaius

Richard Wilson

Morgana

Katie McGrath

Guest Star

Rupert Young

Guest Star

Jonathan Bryan

Guest Star

Richard Ridings

Guest Star

David Schofield

Guest Star

Sarah Parish

Guest Star

Justin Avoth

Guest Star

Victoria Finney

Guest Star

Fintan McKeown

Guest Star

Simon Nehan

Guest Star

Emilia Fox

Guest Star

Jack Sandle

Guest Star

Kevin Eldon

Guest Star

Adam Godley

Guest Star

Jem Wall

Guest Star

Michael Nardone

Guest Star

Joseph Mawle

Guest Star

Laura Donnelly

Guest Star

Jonathan Coyne

Guest Star

Beth Cordingly

Agravaine de Bois

Nathaniel Parker

Guest Star

Charles Dance

Guest Star

Michael Ballard

Geoffrey of Monmouth

Michael Cronin

Guest Star

Mark Lewis Jones

Guest Star

Alice Patten

Guest Star

Alexander Delamere

Guest Star

Emily Beecham

Guest Star

Katie Foster-Barnes

Sir Geraint

Luke Neal

Guest Star

Colin Salmon

Guest Star

Adrian Lester

Guest Star

Rhys Rusbatch

Guest Star

James Cosmo

Guest Star

Amanda Fairbank-Hynes

Cenred

Tom Ellis

Guest Star

Georgia Moffett

Guest Star

Asa Butterfield

Guest Star

John Lynch

Guest Star

Samara MacLaren

Guest Star

Chris McGill

Guest Star

Brian Peck

Guest Star

Santiago Cabrera

Guest Star

Alex Price

Gwaine

Eoin Macken

Guest Star

Jai Armstrong

Hunith

Caroline Faber

Guest Star

Mike Goodenough

Guest Star

David Sterne

Elyan

Tomiwa Edun

Iseldir

Trevor Sellers

Helios

Terence Maynard

Audrey

Zee Asha

Sefa

Sophie Rundle

Director

David Moore

Director

Dave Moore

Director

Ashley Way

Director

Jeremy Webb

Director

Justin Molotnikov

Director

Alice Troughton