Dragonfire (Doctor Who) - Production

Production

Working titles for this story included Absolute Zero, The Pyramid's Treasure and Pyramid in Space. In one scene, the Doctor distracts a guard by engaging him in a philosophical conversation. One of the guard's lines, about the "semiotic thickness of a performed text", is a quotation from Doctor Who: The Unfolding Text, a 1983 media studies volume by John Tulloch and Manuel Alvarado. Story editor Andrew Cartmel had suggested that writers read The Unfolding Text to familiarise themselves with Doctor Who and its history, which inspired Ian Briggs to quote the academic text in his script, in a playful self-reference.

The literal cliffhanger at the end of episode 1 in which the Doctor lowers himself over a guard rail to dangle over an abyss from his umbrella for no apparent reason comes under frequent criticism for its seeming absurdity. As scripted, the Doctor did have a logical motivation for his actions. According to Cartmel in a later interview, the passage leading to the cliff was meant to be a dead end, leaving the Doctor no option but to scale the cliff face. As shot, however, this reasoning became unclear.

For the effects shot of the death of Kane, a wax bust of the actor's screaming face was made and filmed being melted down to a skull within, this footage being sped up to achieve the effect. Though this is very similar to the death of Toht in Raiders of the Lost Ark, for the family audience of Doctor Who the colour red was carefully avoided in the bust. Ronald Lacey, who had portrayed Toht in the film, was director Chris Clough's first choice to play Kane, but was unavailable John Alderton and David Jason were also considered for the part of Kane, but both were also not available for the role.