In an interview in 2015, Theroux expressed his intention to produce a follow-up documentary about Savile for the BBC to explore how the late entertainer had continued his abuse for so long, to meet people he knew closely, and examine his own reflections on his inability to dig more deeply into the first case. This follow-up documentary, with the title Savile, aired on BBC Two on Sunday, 2 October 2016, and lasted 1 hour, 15 minutes.
In December 2015 Theroux captained the team representing Magdalen College, Oxford, on BBC Four's Christmas University Challenge. In their first-round match the team beat University of Exeter by 220 to 130 and Theroux's team went on to win the tournament.