series of "TARDISODEs", short videos available online and via mobile phones promoting the 2006 series of Doctor Who. He has written four full episodes of Doctor Who, "The Shakespeare Code" in 2007, "The Unicorn and the Wasp" in 2008, "The Lodger" in 2010 and "Closing Time" in 2011. He co-wrote 2014's "The Caretaker" with show runner Steven Moffat. Roberts also co-wrote, with Russell T Davies, "Invasion of the Bane", the pilot episode of the Doctor Who spin-off series The Sarah Jane Adventures. He wrote two two-part stories for the full series of The Sarah Jane Adventures, which began broadcasting in the autumn of 2007, and another two two-part stories for the 2008 series. Roberts co-wrote with Davies again for the second of the 2009 specials of Doctor Who, "Planet of the Dead". Gareth Roberts has also written a novelisation of Shada, the uncompleted Tom Baker (Fourth Doctor) story written by Douglas Adams, that was due to be the finale of season seventeen of Doctor Who in 1979 before it was abandoned due to industrial action. The book was published by BBC Books on 15 March 2012. Other work In comedy, Roberts has worked in collaboration with The Fast Show writer and performer Charlie Higson on the sitcom Swiss Toni, a spin-off from The Fast Show. He also collaborated with Higson on scripts for the second series of Randall and Hopkirk for BBC One in 2001. He would reteam with Higson for the superhero-style series Jekyll & Hyde, based on the novel. It was not renewed for a second series. Roberts has also contributed sketches to the Channel Five sketch show Swinging, and wrote for the fantasy series The Librarians. Roberts and Gary Russell wrote Virgin Books' episode guide to The Simpsons, I Can't Believe It's an Unofficial Simpsons Guide (1997), under the pseudonyms Warren Martyn and Adrian Wood. Text from the book's expanded edition, I Can't Believe It's a Bigger and Better Updated Unofficial Simpsons Guide (2000), was subsequently published on the BBC website's Cult TV section. Transphobia controversy On 3 September 2017, Roberts posted on his Twitter account, "I [love] how trannies choose names like Munroe, Paris and Chelsea. It's never Julie or Bev is it?" Later that same day he wrote "It's almost like a clueless gayboy's idea of a glamorous lady. But of course it's definitely not that." These comments were condemned by some Twitter users. In