Caitlin Kimball

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.

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

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

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