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 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.

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.

Paul is shocked to hear from his estranged mother who wants to visit for Rainbow's 13th birthday; Rainbow sees turning 13 as a huge turning point in her life and wants a big birthday party.

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.