- Alex Hook as Frankie Gaines
- Sophia Forest as Jenny Gaines
- Carrie Schroeder as Sigourney Gaines
- Michael Laurino as Will Gaines
- Nicole Alyse Nelson as Dayton Reyes
- Mohana Krishnan as Tammy Gilroy
- Carson Rowland as Cole Reyes
- Armani Barrett as Bryon Patrick
- Uriel Baldesco as Lucia Baxter
- Kristi Beckett as Makayla
- James D. Ballard as Mr. Kingston
- Mark Jacobson as PEGS1 (voice)
- Jayce Mroz as Robbie
- Todd Allen Durkin as James Peters
- Tracy A. Johnson as EGG Lab Engineer
- Tay Lindsey as EGG Lab Engineer
- Rachael Thompson as Engineer Andersen
- Victor Jones as Mr. Manhart
| To view the I am... a Radio? gallery, click here.
- Frankie and Dayton were the first ones to find out about Tammy's secret e-diary and read it.
- Tammy likes to use emojis a lot on social media.
- Tammy thinks that Frankie is a cheater.
- Bryon likes brownies.
- Frankie learned how to bake for the first time.
- Frankie and Dayton are making chocolate brookies at school.
- Bryon's robot got confiscated by Mr. Manhart.
- Frankie is giving out chocolate brookies to the school while Dayton is giving a batch of chocolate brookies to Bryon.
- Cole struggles to study his Algebra test and if he failed it, he wouldn't be able to participate in school sports anymore.
- Frankie hugs Sigourney without being instructed to do so.
- According to Will, Jenny usually hugs him all the time before going to school.
- Engineer Andersen tracked the Gaines family at the volcano in Africa.
- Engineer Andersen was actually able to track down the Gaines family down, but somehow it got relocated to the volcano in Africa.
- Frankie could control and move the robot.