Knights from a parallel universe arrive on Earth to find the legendary sword Excalibur. Only the Doctor and Ace, with the assistance of Brigadier Lethbridge-Stewart, can save the Earth from total catastrophe.

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Main Cast: Sylvester McCoy, Sophie Aldred, Nicholas Courtney, Jean Marsh, Angela Bruce, Marek Anton, Tai Ling, Marcus Gilbert, Christopher Bowen, James Ellis

Director: Michael Kerrigan

Writer: Ben Aaronovitch

Editor: Hugh Parson

Cinematographer:

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