Caitlin Kimball

Caroline uses an abandoned bicycle to start a delivery service for their cupcake business, but she soon finds out that Max has never learned how to ride one.

Rainbow's passion for science deflates when her peers convince her that science isn't cool; Harrison works to mould a testimony from Denise; Santamonica tries to steal the spotlight back after Johan suffers an injury.

After learning that scientists predict the ozone layer will be depleted in 20 years, Rainbow panics and tries to implement Earth Day at school; Rainbow is forced to take matters into her own hands to fight for the cause.

Rainbow and Alicia struggle to fit in at school and stand out at work.

After a teacher tells Rainbow to make sure her hair is "neat" for picture day, she becomes self-conscious and begins a complicated relationship with her hair; Johan and Santamonica struggle with their own hair identity.

When Rainbow is tasked with a school assignment that requires her to trace her roots, she learns that history is more complicated for her mum's side of the family than it is for her dad's.