Simon Guerrier (Author) Simon Guerrier has written countless Doctor Who books, comics, audio plays and documentaries. As research for one of his Doctor Who stories, he studied GCSE astronomy at the Royal Observatory Greenwich 'e" which resulted in an A* and the plot for another Doctor Who story. Simon regularly writes for Horrible Histories Magazine and medical journal The Lancet Psychiatry . With his brother Thomas, Simon also makes films and documentaries 'e" most recently The Fundamentalist Queen , about the wife of Oliver Cromwell, broadcast on Radio 3 in December 2014. Dr. Marek Kukula (Author) Dr Marek Kukula is the Public Astronomer at the Royal Observatory Greenwich, the home of time and space. Originally he wanted to be a Time Lord when he grew up but settled on astronomy as the next most exciting thing, going on to study quasars and distant galaxies with the Hubble Space Telescope. Marek regularly appears on BBC science shows such as The Sky at Night and Bang Goes the Theory to explain the latest astronomical discoveries and has also turned up in Doctor Who Confidential, where he showed Karen Gillan how to view Saturn through a telescope.