Stephen Thorne (2 March 1935 – 26 May 2019) was a British actor. He largely worked in radio, appearing in over 2000 BBC broadcasts. He is well-known for his roles as villains Omega, Azal and Eldrad in "Doctor Who". He acted in other TV series including "Z-Cars", "Crossroads" and "Last of the Summer Wine". He recorded over 300 audiobooks including children's stories. He was born in London and trained at the Royal Academy of Dramatic Art (RADA).