Producers: Apartment 11 Productions

The Big Question: “Why do people hate the sound of fingernails on a chalkboard?”

Synopsis: Harrison is joined by rapper and musician Kid Koala, a special guest canine, and opera singer Lindsay Michael. Individually, these experts help us find out about the delicate mechanisms that help us hear. The special guest canine helps Harrison figure out whether dog whistles really are silent, and Lindsay Michael tests out whether a person can actually shatter a crystal glass with their voice. Viewers at home find out if they have bat-like hearing!

My Great Challenge: Kids must compete to see who can give our opera singer goose bumps by figuring out which material to scratch together to make the shriekiest sounds!

In the Field: Harrison travels to the sea aquarium and discovers that certain fish may use sound to communicate – by farting at each other!

The Big Question: “Is snow really white?”

Synopsis: With the help of an animal expert, Harrison finds out how chameleons change color and viewers find out if they’re lion sighted in a color blindness test. A physicist explains why there are some colors that we can’t see, and viewers get a bug’s eye view of the world in order to discover how bugs see things that are invisible to humans! Harrison carries out an experiment to see if kids will turn their noses up at a batch of blue scrambled eggs!

My Great Challenge: In this week’s challenge, viewers have to make colors – with other colors!

In the Field: Harrison takes to the skies in an Air Force search and rescue helicopter for a high-flying experiment to find out why some colours attract our eye more than others.