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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Verdict: Unknown
> Michael Kerrigan (Director)
> Ian Dow (Lighting Director)
> David Lock (Lighting Director)
> Ben Aaronovitch (Writer)
> Andrew Cartmel (Script Editor)
