Human Nature (Doctor Who Episode) - Production

Production

Human Nature was Paul Cornell's fifth original novel, all having been Doctor Who stories for Virgin Publishing, and the thirty-eighth New Adventure. The plot was developed with fellow New Adventure novelist Kate Orman and the book was well received on its publication in 1995. Several years later, the revived Doctor Who television series included several people who had worked on the New Adventures. For his second story for the television series, Cornell adapted his novel. Although most praise for the script was directed at Cornell, a great deal of the episode had in fact been rewritten by executive producer Russell T Davies.

Despite Julie Gardner's position as executive producer since "Rose", this episode marks the first time since Verity Lambert's 1965 swansong, "Mission to the Unknown", that a woman was the credited producer of an episode of Doctor Who. However, it is not producer Susie Liggat's first production job in the Doctor Who universe: in 2006, she produced "Invasion of the Bane", the first episode of The Sarah Jane Adventures. Thus, only she and John Nathan-Turner have produced episodes from two different programmes set in the Doctor Who universe.

The physical prop of John Smith's journal notebook was created by artist Kellyanne Walker, and incorporates text provided by writer Paul Cornell. Much of the episode was filmed at St Fagans National History Museum, an open-air museum near Cardiff, and Treberfydd, the Victorian Gothic mansion which served as Farringham School, located near Llangorse Lake in south Wales. Other interior locations were filmed at Llandaff Cathedral, Cardiff.

The Doctor's list of 23 directives, much of which is sped through in the episode, is presented at normal speed in a deleted scene released on the BBC DVD. In place of the nonexistent unheard requests, David Tennant breaks the fourth wall to speak humorously about a love for The Housemartins and also spout gibberish to pad out the time before returning to character for the 23rd and final directive. Another instruction, about not letting Smith eat pears, appears in both the deleted scene and in the novel Human Nature.

Radio Times credits David Tennant as John Smith for Human Nature and as The Doctor for The Family of Blood. On-screen credits read The Doctor/Smith for Human Nature and The Doctor for The Family of Blood.