In this programme Clive & Klaudia talk about diets and in particular vegetarian and vegan diets which are increasingly popular with young people. We wonder how easy it is to get all the vitamins and proteins your body needs without eating any meat and worry whether people - especially younger people - switching to vegetarian diets really understand the implications of doing so. We also ask whether it is possible for older people to make drastic changes in their diets and what would persuade them to do so.

Plus Clive is fascinated by Elon Musk's red Tesla sports car being launched into space and heading towards Mars and we look at one of the latest robot developments, a robot Police car aimed at monitoring speeding on motorways.