Also in 2019, 23 years after initially playing the role, Roberts reprised his version of the Master, working with Big Finish Productions. He made his debut in series 5 of the spinoff series, The Diary of River Song. Later that year, he appeared in the finale of the Eighth Doctor story line, "Ravenous," once more working opposite Paul McGann. In January 2021, Roberts appeared in "Masterful," a special release celebrating the 50th anniversary of the debut of the Master. And in March 2021, he will appear in his own spinoff series, "Master!" as well.