 Julie Graham, Ian McElhinney and Steve Toussaint guest star in the two-part finale, "Ascension of the Cybermen" / "The Timeless Children".In April 2015, Steven Moffat confirmed that "Doctor Who" would run for at least another five years, extending the show until 2020.In May 2017, it was announced that due to the terms of a deal between BBC Worldwide and SMG Pictures in China, the company has first right of refusal on the purchase for the Chinese market of future series of the programme until and including Series 15.