The Crimes of Thomas Brewster

The Crimes of Thomas Brewster is a Big Finish Productions audio drama based on the long-running British science fiction television series "Doctor Who". It was broadcast on BBC Radio 4 Extra from 28 May – 4 June 2016.
Plot.
In modern-day London, Detective Inspector Patricia Menzies is investigating a strange new mob boss known as the Doctor. Meanwhile, the real Doctor is being chased by giant robot mosquitoes and Evelyn Smythe is taking the tube to an alien world.