Tesla's 'Gigafactory'

Zoe Kleinman presents this week's programme. North America tech reporter Dave Lee tells us about his visit to Tesla's new battery factory in the desert and Israeli tech firm Aquarius Engines pitches one of the alternatives to battery power. Zoe takes a trip on a high-tech search and rescue boat, and Edwin Lane finds out why old formats like VHS are still so popular. Tech journalist Kate Bevan is our special guest and the BBC's Chris Foxx rounds up the news.

(Photo: Tesla cars, Credit: Getty Images)