How many episodes where in the season of "Doctor Who" broadcast on 29 April 2017 on BBC?
Thin Ice (Doctor Who):  It is written by Sarah Dollard and was broadcast on 29 April 2017 on BBC One. Doctor Who (series 10): The tenth series of the British science fiction television programme "Doctor Who" premiered on 15 April 2017 and concluded on 1 July 2017, and consisted of twelve episodes, after it was announced in July 2015 that BBC Worldwide had invested in a tenth series of the programme in its annual review.
i don't know