- “People change people.”
- ―Cory Matthews to his class
When Lucas' old friend Zay comes to New York, Lucas begins to wonder if New York had really changed him and he starts to keep secrets from Riley.
- Rowan Blanchard as Riley Matthews
- Ben Savage as Cory Matthews
- Peyton Meyer as Lucas Friar
- Sabrina Carpenter as Maya Hart
- August Maturo as Auggie Matthews
- Danielle Fishel as Topanga Matthews
- Amir Mitchell-Townes as Isaiah "Zay" Babineaux
- Shak Ghacha as Joey Ricciardella
- Nicholas Jabonero as Yogi
- First appearance of Zay.