In the week that Julian Assange walks free, we explore the story of WikiLeaks' unprecedented data releases and how he and his organisation changed the way journalists and newsrooms operate. We also assess if his guilty plea to a US espionage charge will have a chilling effect on national security journalism. Also in the programme, Steven Moffat, the writer behind global TV hits such as Sherlock and Doctor Who. He reveals why he wanted to tackle cancel culture in his new comedy-drama “Douglas is Cancelled”.