Caitlin Kimball

An abandoned bicycle gives Caroline the idea to start a delivery service for the cupcake business, but she is surprised when she discovers that Max never learned to ride.

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

In the wake of the Challenger tragedy, Rainbow and her family handle their grief in different ways; Denise realises that life is too short, so she vows to right all the wrongs she's done in her life.

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.

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 mom's side of the family than it is for her dad's.