Six-year-olds Milo and Melissa meet for the first time and Murphy's Law makes their first day of kindergarten a big adventure.
Tropes:
- Chekhov's Gun: The Time Delineation Device in Dakota and Cavendish's training vehicle ends up being used to save Milo and Melissa.
- Continuity Nod: Dr. Doofenshmirtz is telling Dakota about the day he met Perry the Platypus, as seen in the Phineas and Ferb episode "It's About Time".
- Framing Device: The main plot is about Milo and Melissa telling Zack about the day they first met and how they became friends and the subplot is about Dakota telling Doofenshmirtz how he and Cavendish joined the Bureau of Time Travel and became partners.
- Origins Episode: This episode shows the origins of Milo and Melissa's friendship; Dakota and Cavendish's friendship; and Bradley's hatred towards Milo.
