Series 1, Episode 6 - Gruesome Guts
Why do we poo and how does digestion work? Who was Louis Pasteur and what is his legacy?
Mark arrives at the studio with terrible stomach pains and asks the Shrinking Scientists to find out what is wrong with him.
In their toughest mission yet, Dr Sensible, Professor Small and Junior get ready to fly up Mark's nose to investigate.
- Sunday 18th October 2015
- 25 minutes