Callum Brown was the editor for the 2020 P.R.O.B.E. webcast Shadows of Doubt, Stacey Facade, Manchester, Peckham Poltergeist, Shadow People, Varunastra, Doctor X, Goo!, Sherwood Sorceress, Ichor, and Fog. He also illustrated the P.R.O.B.E. short story The Door We Forgot and the Cwej short story Collective Unconscious with Stuart Brown.