Ian Sample is an award-winning science correspondent at the Guardian. He was named investigative journalist of the year in 2005 by the Association of British Science Writers. He was previously a feature writer for New Scientist and holds a PhD in biomedical science from Queen Mary, University of London. Ian's first book is Massive: The Hunt for the God Particle.

http://www.iansample.com

First broadcast on 6th August 2010

Robin Ince is a comedian and writer. For the last two years he has been the host of Nine Lessons and Carols for Godless People. His Radio 4 show with Professor Brian Cox, The Infinite Monkey Cage, has just finished it's second series. Robin has recently written a book, Robin Ince's Bad Book Club, which casts a critical eye over Don Estelle's autobiography, tales of giant killer crabs, and romance novels set in the Antarctic.

http://www.robinince.com

First broadcast on 30th July 2010

Victor J. Stenger is emeritus professor of physics and astronomy at the University of Hawaii and adjunct professor of philosophy at the University of Colorado.

Stenger was a pioneer in the emerging research focused on neutrino astronomy and very high-energy gamma rays. His final research project prior to retirement as an experimental physicist was participating in the Japan based Super-Kamiokande underground experiment, which demonstrated that the neutrino had mass, and which won its leader the 2002 Nobel Prize for Physics.

Nowadays Stenger is principally known as a critic and skeptic of Intelligent Design and other ideas of pseudoscience. He is also skeptical about fine-tuning of cosmological constants. He has published a number of books intended for general audiences on the subjects of physics and cosmology, philosophy, religion, and pseudoscience featuring God the Failed Hypothesis, Not by Design and most recently, New Atheism.

http://www.colorado.edu/philosophy/vstenger/

First broadcast on 23rd July 2010

Helen Keen is a stand-up comedian and writer, she was a finalist in the 2005 Funny Women competition and the Hackney Empire New Act of the Year competition and has been nominated for the Leicester Mercury Comedian of the Year award. She won the first Channel 4 New Comedy Writing Award in 2005. Since then she has written for, among others, Channel 4's Friday Night Project and BBC Radio 4's The Now Show and is currently developing scripts with BBC3, Channel 4 and BBC Radio 4. Helen's award winning show about space, It is Rocket Science!, is being re-launched at this years Edinburgh Festival and is currently being developed into a show for Radio 4. Helen is also co-hosting a new show, Starstruck!, at Edinburgh with Astrophysicist Dr Sophia Khan.

http://www.helenkeen.com

First broadcast on 16th July 2010