WARNING: Embargoed for publication until 00:00:01 on 23/05/2017 - Programme Name: Doctor Who S10 - TX: 27/05/2017 - Episode: The Pyramid At The end Of The World (No. 7) - Picture Shows: ***EMBARGOED UNTIL 00:01hrs 23rd MAY 2017*** Ilya (ANDREW BYRON), The Commander (NIGEL HASTINGS), Xiaolian (DAPHNE CHEUNG) - (C) BBC/BBC Worldwide - Photographer: Simon Ridgway