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Hackers breach the systems of one of the UK's biggest broadband and mobile phone providers TalkTalk. The company says it has received a demand for money from the purported hacker. Is this a worrying new turn in how hackers target companies? YouTube launches an ad-free subscription service, but other tech giants are also circling around digital video. The internet goes crazy with "Back to the Future Day" - but how true to the film trilogy was October 21st 2015? And how an Israel-based DIY website company wants to offer musicians a way to control their entire artistic output.

Presented by Rory Cellan-Jones, with Leo Kelion, Dave Lee, and Mark Ward from the 主播大秀 Online tech desk, and special guest BT futurologist Dr Nicola Millard. (Picture: Security keypad, Credit: Thinkstock).