BBC Astronauts winner Dr Suzie Imber and Gravitational Waves

Malcolm and Andrew were delighted to be joined by Dr Suzie Imber, a space scientist and winner of the wonderful BBC show Astronauts: Do you have what it takes? Andrew and Suzie chatted about the show and Suzie's research as well as Elon Musk's plans to colonise Mars.

With the discovery of graitational waves coming from two massive black holes hitting the news last week, Andrew and Malcolm were very fortunate to be joined by Professor Gabriela Gonzalez of the LIGO facility to talk about the significance of the discovery.

A fair few other science stories crop up before John Ford pops in to tell Malcolm and Andrew what they could have been talking about instead.