It's Only a Theory - Season 1
1 - Episode One
Air Date: October 6, 2009
The guest celebrity is sports presenter Clare Balding and the experts are Dr Aubrey de Grey and Lucy Beresford.
2 - Episode Two
Air Date: October 14, 2009
Andy Hamilton, Reginald D Hunter and Martha Kearney decide if experts' theories are valid.
3 - Episode Three
Air Date: October 25, 2009
The guest celebrity is broadcaster Kirsty Wark and the experts are Dr David Bainbridge, Professor Chris Budd and Professor Stanley Wells.
4 - Episode Four
Air Date: November 2, 2009
The guest celebrity is broadcaster Clare Balding and the experts are Prof Geoff Beattie and Marcus Chown.
5 - Episode Five
Air Date: November 9, 2009
The guest celebrity is broadcaster Martha Kearney and the experts are Julian Richards and Dr Peter Thompson.
6 - Episode Six
Air Date: November 10, 2009
The guest celebrity is Vince Cable MP and the experts are, once again, Dr David Bainbridge and Marcus Chown.
7 - Episode Seven
8 - Episode Eight
Air Date: November 24, 2009
Clare Balding returns to the judge's chair, with experts David Ryan and Marcus Chown presenting the final theories of the series.