Battlefield (1) Doctor Who : Season 26 Episode 1
TV-PG BBC Television 25m int(0)
Aired: September 6th, 1989 @ 5:15 PM EST on BBC Television
Knights from a parallel universe arrive on Earth to find the legendary sword Excalibur. And only the Doctor and Ace with the assistance of Brigadier Lethbridge Stewart and save the Earth from total catastrophe.