The British Film Institute has uploaded a 30 minute video from the premiere of An Adventure in Space and Time onto its website. Journalist Matthew Sweet leads a discussion on a new BBC drama revealing the story behind Doctor Who’s genesis. Jessica Carney – granddaughter and biographer of original Who actor William Hartnell – joins writer Mark Gatiss and actors David Bradley and Sacha Dhawan to talk about one of television history’s defining moments.

You can access the video here.