During the original series, the script editor worked in conjunction with the series producer in developing the creative direction of the series and they held the power to commissionscripts, effectively becoming second in command to the producer. However, once Doctor Who moved to BBC Wales, the title came to describe a significantly different position. Beginning with the 2005 series, the role of the Doctor Who script editor diminished significantly, in deference to the rise of the new position of "Head Writer". In many respects, Russell T Davies and his successor Steven Moffat have proven the closest analogue to the old position, but as they are also executive producers, they have had a much greater range of responsibilities than script editors of the original series. Script editors of the new series do not have the power to commission scripts. Instead, they act as liaisons between the production staff and the screenwriter, before passing their joint work to the Head Writer for a "final polish". Moreover, script editors in the BBC Wales version are assigned not to whole seasons, but to individual episodes — or at most "blocks" of 2-4 episodes produced concurrently. Acknowledging that the Head Writer is much closer to being the script editor of the past, Helen Raynor has said that the modern Doctor Who script editor's job isn't a creative one, but "in the next seat to creativity ... a nuts and bolts job [in which] you do participate, you are a part of it, but you aren't driving it."
Also script editor on The Sarah Jane Adventures on all episodes from 2008-2011; and script editor for four episodes of Torchwood ("Dead Man Walking", "A Day in the Death", "Something Borrowed" and "Fragments")
Since the 2011 series, the job description has changed. Lindsey Alford (see above) was credited as "Script Executive" for the 2011 run, Caroline Henry was "Script Executive" on "The Doctor, the Widow, and the Wardrobe", and in 2012-13 associate producer Denise Paul took the credit of "Script Producer". John Phillips was credited as "Assistant Script Editor" for majority of Series 7 except for "Dinosaurs on a Spaceship" and "A Town Called Mercy".
For Season 11, broadcast from October 2018, Sheena Bucktowonsing was credited as Series Script Editor on each episode, alongside other production crew who were credited as Script Editor, Script Supervisor and Assistant Script Supervisor on various individual episodes.