Horrible Science

This episode coughs up the disgusting details of snot, sneezes and viruses, from the cruel common cold to shocking smallpox.

Red blood - what is it and why do we need it? How does it transport important things around the body? Bob the robot needs his first aid badge so he can go to the robot jamboree - the only trouble is he is hates blood. Mark is stopped just in time by expert Charles Drew as he is about to give someone a blood transfusion from a dog!

This episode features explosions, atoms and fiendish forces that bubble, go bang and bump! What makes things explode? Lucy has made a mistake in the script and now everyone thinks the show is about elephants. It is a disaster - especially as their guest is the legendary scientist Marie Curie!

This episode examines what happens to our bodies in space. Can we live on other planets? Who invented the telescope, and how can we make one at home?

Gruesome greenhouse gasses and deadly toxic waste. Why do we recycle and what would happen if we stopped? Is global warming really bad news? The team try and find out what is going on with the climate, although the show nearly ends in disaster again when they discover there is a bear roaming free in the studio!

Poo, pizza and disgusting germs. Why do we poo and how does digestion work? Who was Louis Pasteur and how did he help?

What nasty invaders live in our homes and on our bodies? Fleas, parasites, worms and every tiny, disgusting thing in between. Mark can't stop itching, but no one knows what's causing it.

What is the brain and how does it work? Mark arrives in the studio with a new pair of pants, 'Smarty Pants' - he has bought them off the internet and claims that they will make him smarter.

Bang, crash, wallop! What is a sound, how do we hear, and how do our ears work? Inventor of the telephone Alexander Graham Bell joins the team in the studio to talk telephones and metal detectors.

Flesh eating plants & dancing flowers are all packed into the show this week. Mark and Lucy both bring in their favourite plant but as always Mark thinks his is the best - until it starts to die.