- William Russell
- Â Sir Lancelot du Lac / ... 30 episodes, 1956-1957
- Cyril Smith
- Â Merlin 23 episodes, 1956-1957
- Ronald Leigh-Hunt
- Â King Arthur 22 episodes, 1956-1957
- Robert Scroggins
- Â Brian 19 episodes, 1956-1957
- David Morrell
- Â Sir Kay / ... 20 episodes, 1956-1957
- Derren Nesbitt
- Â Andred / ... 14 episodes, 1956-1957
- Jane Hylton
- Â Queen Guinevere / ... 11 episodes, 1956-1957
- Edward Judd
- Â Abel / ... 11 episodes, 1957
- Reginald Hearne
- Â Blacksmith / ... 10 episodes, 1957
- Frederick Treves
- Â 1st Guard / ... 10 episodes, 1956
- John Gale
- Â Sir Christopher / ... 10 episodes, 1956-1957
- Douglas Argent
- Â First Knight / ... 9 episodes, 1956-1957
- Eric Corrie
- Â Herald / ... 9 episodes, 1957
- Nigel Green
- Â 2nd Thief / ... 8 episodes, 1956-1957
- Paul Williamson
- Â Sir Lionel / ... 7 episodes, 1956-1957
- Garry Thorne
- Â Guard / ... 6 episodes, 1956
- Bruce Seton
- Â King Arthur 2 episodes, 1956
- Zena Walker
- Â Lady Angela 2 episodes, 1956-1957
- Derek Aylward
- Â King Marhaus 2 episodes, 1956-1957
- George Woodbridge
- Â Leonides / ... 2 episodes, 1956
- Jennifer Jayne
- Â Elsa / ... 2 episodes, 1956
- Brian Worth
- Â Sir Kay / ... 2 episodes, 1956
- Hector Ross
- Â Baron Braynor / ... 2 episodes, 1957
- Colin Tapley
- Â Everard / ... 2 episodes, 1957
- Peter Bennett
- Â Leonides / ... 2 episodes, 1956
- Jeanette Hutchinson
- Â 2nd Woman / ... 2 episodes, 1957
- Edward Malin
- Â Father Till / ... 2 episodes, 1956-1957
- John Dearth
- Â King Pell / ... 2 episodes, 1956-1957
- Andrew Crawford
- Â Sir Gawaine 2 episodes, 1956
- Edwin Richfield
- Â Sir Christopher / ... 2 episodes, 1956
- Paul Hansard
- Â Lionel / ... 2 episodes, 1956
- Noel Davis
- Â Bartender / ... 2 episodes, 1957
- Alfie Bass
- Â Barney Brandygore 1 episode, 1956
- Noel Purcell
- Â Liam 1 episode, 1956
- Gerald Cross
- Â Trullus 1 episode, 1956
- Jerome Willis
- Â Prince of Limerick 1 episode, 1957
- Mary Steele
- Â Princess Anne 1 episode, 1957
- Ballard Berkeley
- Â Sir Urgan the Strong 1 episode, 1956
- Peter Coke
- Â Torwald 1 episode, 1956
- Mary Laura Wood
- Â Queen Isolt 1 episode, 1956
- Dan Cunningham
- Â Sir Bernard 1 episode, 1956
- Gillian Owen
- Â Katharine 1 episode, 1956
- Carol Marsh
- Â Sybil 1 episode, 1957
- Martin Benson
- Â Hassim 1 episode, 1957
- Alison Leggatt
- Â Morgan le Fay 1 episode, 1957
- Tommy Duggan
- Â Baron Wicklaw 1 episode, 1957
- Linda Gray
- Â Marta 1 episode, 1957
- Patricia Kneale
- Â Ellen 1 episode, 1957
- Jack Melford
- Â Norrin 1 episode, 1957
- George Murcell
- Â Jaggyd 1 episode, 1956
- Michael Blakemore
- Â Cedric 1 episode, 1956
- Norah Gorsen
- Â Lady Helen 1 episode, 1956
- Wynona Cheyney
- Â Lydia 1 episode, 1956
- Robert Hardy
- Â Sir Rupert 1 episode, 1957
- Maxine Audley
- Â Eunice 1 episode, 1957
- John Horsley
- Â Athelred 1 episode, 1957
- Ann Stephens
- Â Sella 1 episode, 1957
- Shirley Cooklin
- Â Lady Lilith Goodhugh 1 episode, 1957
- Howard Pays
- Â Sir Alfred / ... 1 episode, 1957
- Julian Somers
- Â Kafan 1 episode, 1957
- Virginia Vernon
- Â Lady Lynette 1 episode, 1957
- Lynn Furlong
- Â Princess Kathleen 1 episode, 1957
- Brown Derby
- Â John 1 episode, 1957
- Chin Yu
- Â Zuleika 1 episode, 1957
- Patrick McGoohan
- Â Sir Glavin 1 episode, 1956
- Norman Mitchell
- Â Telmah 1 episode, 1956
- Meadows White
- Â Aidan 1 episode, 1956
- Hermene French
- Â Lorraine 1 episode, 1956
- Leonard Sachs
- Â King Rolf 1 episode, 1957
- William Franklyn
- Â Baron Mortaise 1 episode, 1957
- John Bailey
- Â Sir John 1 episode, 1957
- Richard Leech
- Â Sir Liones 1 episode, 1957
- Derek Waring
- Â Balin 1 episode, 1957
- Gerard Heinz
- Â Eck 1 episode, 1957
- Margaret Anderson
- Â Lady Helen 1 episode, 1957
- Tony Quinn
- Â King Anguish 1 episode, 1957
- Duncan Lewis
- Â King Meliot 1 episode, 1957
- George Merritt
- Â Lloyd 1 episode, 1956
- David Bough
- Â Michael 1 episode, 1956
- Jack May
- Â Caradoc 1 episode, 1957
- Diana Fairfax
- Â Lady Margaret 1 episode, 1957
- Avice Landone
- Â Lady Lamorak 1 episode, 1957
- Mary Manson
- Â Helga 1 episode, 1957
- Graham Stewart
- Â Damien 1 episode, 1957
- Hazel Penwarden
- Â Lady Bragwaine 1 episode, 1957
- Peter Assinder
- Â Happy Thief 1 episode, 1957
- Fred Goddard
- Â Horg 1 episode, 1957
- Roma Dumville
- Â Lady Eleanor 1 episode, 1957
- Barry Fennell
- Â Richard 1 episode, 1957
- John Charlesworth
- Â Robert 1 episode, 1956
- Robert Crewdson
- Â Harpist 1 episode, 1956
- John Cazabon
- Â Father Telford 1 episode, 1956
- Edmond Warwick
- Â Matt 1 episode, 1956
- Simone McQueen
- Â Mary 1 episode, 1956
- Ian Whittaker
- Â Gault 1 episode, 1957
- Alan Edwards
- Â Sir Gringamore 1 episode, 1957
- June Sylvaine
- Â Gloria 1 episode, 1957
- Catherine Ellison
- Â 1st Woman 1 episode, 1957
- Sidney Head
- Â Wooden Leg 1 episode, 1957
- James Grout
- Â Petroc 1 episode, 1956
- Shaun O'Riordan
- Â Sir Cebus 1 episode, 1956
- Wilfrid Brambell
- Â Fisherman 1 episode, 1957
- Brian Roper
- Â Alan 1 episode, 1957
- Terry Yorke
- Â Man-At-Arms 1 episode, 1957
- Brian Nissen
- Â Sir Gawaine 1 episode, 1957
- Kenneth Luckman
- Â Welshman 1 episode, 1956
- Frederick Jaeger
- Â Sir Christopher 1 episode, 1957
- Robert Robinson
- Â Merchant 1 episode, 1957
- Harold Goodwin
- Â Peasant 1 episode, 1957
- Philip Lennard
- Â Lord Mayor 1 episode, 1957
- Anarose Carrigan
- Â Woman 1 episode, 1957
- Brian Moorehead
- Â Guard 1 episode, 1957
- Evelyn Cordeau
- Â First Sister 1 episode, 1956
- Sally Deane
- Â 1st Maiden 1 episode, 1956
- Max Faulkner
- Â Peasant 1 episode, 1957
- Maureen Davis
- Â Handmaiden 1 episode, 1957
- Desmond Rayner
- Â Jailer 1 episode, 1957
- Sidney Vivian
- Â Baker 1 episode, 1957
- Paul Way
- Â Chinese Dice Player 1 episode, 1957
- Yvonne Romain
- Â Second Sister 1 episode, 1956
- Caroline Denzil
- Â Isobel 1 episode, 1956
- Anthony Toller
- Â 1st Boy 1 episode, 1956
- Michael Scott
- Â Third Knight 1 episode, 1956
- David King
- Â Dramas 1 episode, 1956
- Guy Standeven
- Â Soldier (uncredited) 1 episode, 1956
- Peter Brace
- Â Knight (uncredited) 1 episode, 1956
- Fred Haggerty
- Â Courtier (uncredited) 1 episode, 1956
- John More
- Â Knight (uncredited) 1 episode, 1956
- Ernest Fennemore
- Â Courtier (uncredited) 1 episode, 1956
- Pauline Olsen
- Â Enid (uncredited) 1 episode, 1956
