Sezon 47
Bölümler
1 Do I Drink Too Much? 13 Eki 2009 2 The Secret You 20 Eki 2009 3 Fix Me 27 Eki 2009 4 Who's Afraid of a Big Black Hole? 3 Kas 2009 
5 Why Do We Talk? 10 Kas 2009 6 How Long is a Piece of String? 17 Kas 2009 7 The Secret Life of the Dog 6 Oca 2010 8 Why Do Viruses Kill? 13 Oca 2010 9 Pill Poppers 20 Oca 2010 10 Don't Grow Old 3 Şub 2010 11 To Infinity and Beyond 10 Şub 2010 12 What Makes a Genius? 17 Şub 2010 13 Did Cooking Make Us Human? 2 Mar 2010 14 Is Everything We Know About the Universe Wrong? 9 Mar 2010
5 Why Do We Talk? 10 Kas 2009 6 How Long is a Piece of String? 17 Kas 2009 7 The Secret Life of the Dog 6 Oca 2010 8 Why Do Viruses Kill? 13 Oca 2010 9 Pill Poppers 20 Oca 2010 10 Don't Grow Old 3 Şub 2010 11 To Infinity and Beyond 10 Şub 2010 12 What Makes a Genius? 17 Şub 2010 13 Did Cooking Make Us Human? 2 Mar 2010 14 Is Everything We Know About the Universe Wrong? 9 Mar 2010