Anderson began writing for Big Finish Productions in 2015, contributing to the anthology release You are the Doctor (and Other Stories). Subsequent to its release in December 2015 he began directing a selection of the company's main range of Doctor Who audio plays.[7] His directorial duties were extended to design work in 2016 when he was involved with the visualisation of a Stained glassDalek with artist Chris Thompson, for a Colin Baker story Order of the Daleks written by Mike Tucker. In addition, he played a role in the Big Finish releases based on two of his father’s creations, Terrahawks and Captain Scarlet and the Mysterons.
Outside of Big Finish Productions, Anderson also crowdfunded via Kickstarter the publication of a series of novels based on ideas created by his father, called Gemini Force One.