Are privacy fears over Alexa's new ability to offer medical advice from the UK's National Health Service justified? Plus, how super-car maker Aston Martin thinks it can persuade its customers to swap the roar of a V12 engine for the near-silence of electric propulsion. And we hear about the disturbing rise of "stalkerware" apps. Presented by Rory Cellan-Jones, with BBC tech reporter Chris Fox, and special guest Charlotte Jee from the MIT Tech Review. (Image: An Amazon Echo smart speaker on a coffee table alongside an ear thermometer and some pills, Credit: Andrew Matthews/ PA Wire).