Iris was initially portrayed as an eccentric and unreliable Time Lady, whose TARDIS takes the form of a London AEC Routemaster double-decker bus (the route 22 to Putney Common), though in a series of short story collections and novels not written for the BBC, the character has been repurposed to remove any copyrighted aspects. Iris Wildthyme was originally created for Magrs' unpublished first novel, which was named after her; another version of Iris also appears in "Marked for Life". The character features in all of Magrs' three contributions to BBC Books' Eighth Doctor Adventures, in several Big Finish Productions audio dramas by Magrs and other writers, in a novel series from Snowbooks and in short story and novella collections published by Big Finish and Obverse Books.