Season 4
Episodes
1 How Your Nerves Work Jan 18, 2016 
2 Can I Borrow Some Of Your Blood Jan 25, 2016 
3 Who Stole The Milk Feb 1, 2016 
4 What's in your Diarrhoea? Feb 8, 2016 
5 The Big Skin Mystery Feb 15, 2016 
6 Superhero Kidneys Feb 22, 2016 
7 Fire in the Lab! Feb 29, 2016 
8 Before You Were Born Mar 7, 2016 
9 Best Of... Mar 14, 2016 
10 Don't Panic About Puberty (Special) Mar 21, 2016