3 summers have passed since Topanga decided not to move to London and Riley and the gang start their senior year in high school next week but what will happen when the gang finds Farkle passed out in the a parking lot all they need is a spark of hope for Farkle to live.
- Rowan Blanchard as Riley Matthews
- Sabrina Carpenter as Maya Hart
- Corey Fogelmanis as Farkle Minkus
- Danielle Fishel as Topanga Matthews
- August Masturo as Auggie Matthews
- Ben Savage as Cory Matthews
- Peyton Meyer as Lucas Friar
- Cecilia Balagot as Isadora Smackle
- Amir Mitchell–Townes as Zay Babineaux
- This is first episode of season 4.