monster's chest. It explodes. Back at the convoy, The Doctor confronts Morgaine, telling her of Arthur's death. Mordred and Morgaine are then imprisoned. Production The story was repeated on BBC2 over four consecutive Fridays from 23 April – 14 May 1993, achieving viewing figures of 1.6, 1.2, 1.3, and 1.2 million respectively. Pre-production Working titles for this story included Storm Over Avallion. The early story outlines included the death of Lethbridge-Stewart. In a deleted scene (included on the DVD release) the Doctor refers to one of Clarke's three laws — telling Ace that sufficiently advanced technology is indistinguishable from magic — to explain the various forms of magical attack used against them by the sorceress Morgaine, and also that Arthur's trans-dimensional spaceship was grown, not built. He adds that the reverse of Clarke's Law is also true. Production The first director approached to handle Battlefield was Graeme Harper, who had previously directed The Caves of Androzani and Revelation of the Daleks in 1984 and 1985 respectively. However, Harper was committed to the Central Independent Television drama series Boon, and unavailable to return to Doctor Who. During recording of the sequence where Ace is trapped in the glass water tank, the glass cracked, causing Sophie Aldred to sustain minor cuts to her hands and creating a major safety hazard as water flooded out onto the studio floor, across which live wires were running. The moment when the tank first cracked can be seen in Part Three as the Doctor struggles with the controls and Ace is lifted clear of the water. Sylvester McCoy shouted out to the stage hands above her to pull her quickly out before the tank exploded. Cast notes Nicholas Courtney returned explicitly as the Brigadier for the first time since The Five Doctors in 1983, Courtney's small cameo role in 1988's Silver Nemesis having been unidentified. Other guest stars making return appearances in Battlefield include Jean Marsh, who over twenty years earlier had played Princess Joanna in The Crusade and later, companion Sara Kingdom in The Daleks' Master Plan, which had been, coincidentally, Nicholas Courtney's first Doctor Who story; and June Bland, who appeared in the Fifth Doctor story Earthshock. Angela Bruce later reprised the role of Brigadier Winifred Bambera in the audio play Animal. Commercial releases In print Marc Platt's novelisation was published by Target Books in July 1991. Its prologue features the future Merlin Doctor