Written by Nabil Shaban (better known as Sil from the Colin Baker "Doctor Who" stories "Vengeance on Varos" and "The Trial of a Time Lord") who was a longtime fan of "Doctor Who" and had previously suggested himself to replace the late Roger Delgado as the Master. In offering this script to the production office in 1980, Shaban also put himself forward as a potential successor to Tom Baker as the Doctor. Nothing came of "Invasion of the Veridians". Nabil Shaban had only written the first episode, it was written around the early 1970s, and was very much influenced by the Troughton/Pertwee era. Nabil believes that the only copy has now been lost to time, as he no longer has it.