Doctor Who's new companion didn't realise she had the roleTo play this video you need to enable JavaScript in your browser.This video can not be playedDoctor Who's new companion didn't realise she had the roleCloseMore on this story.SubsectionCulturePublished3 AprilShareclose panelShare pageCopy linkAbout sharingRelated topicsDoctor WhoFollow Doctor Whoclose panelYou are now following Doctor WhoUpdates from your News topics will appear in My News and in a collection on the News homepage.Read description