Battlefield (Doctor Who)

Notes

• Working titles for this story included Nightfall and Storm Over Avallion. An early version of the script was to have included the death of Lethbridge-Stewart.
• The story was novelised by Marc Platt and published by Target Books in 1991, ISBN 0-426-20350-X.
• Bessie appears for the first time since The Five Doctors. UNIT itself would not appear again on television until the 2005 series episode Aliens of London.
• Morgaine is played by Jean Marsh, who had once played companion Sara Kingdom in The Daleks' Master Plan. She was also once married to Third Doctor actor, Jon Pertwee. See also Celebrity appearances in Doctor Who.
• The Doctor refers to one of Clarke's three laws — telling Ace that sufficiently advanced technology is indistinguishable from magic; hence explaining the "sorcery" in the story.
• It is implied that Merlin is, or will be, a future regeneration of the Doctor. It is also possible that Merlin is an alternate Doctor from the same parallel universe that Morgaine and the rest of the knights are from.