In this comet-trailing bonus episode, Andrew shares a couple of interviews we grabbed at a fantastic talk called Rosetta: To Catch a Comet at the National Museum, Cardiff.

Professor Mark McCaughrean, who gave the talk, tells us about how and why the European Space Agency made the short film Ambition, and the role science fiction plays in spreading the word about space exploration.

Astrophysicist Franziska Batten Zaunig, who helped to organise the talk for Cardiff University, gives us some background about Rosetta, Philae and Comet 67P, and enthuses about the brilliant Rosetta and Philae Cartoons.

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