This Is It is the first episode of season one of One Day at a Time.
Penelope tries to convince her feminist daughter Elena to have a traditional quinceañera to celebrate her 15th birthday and to honor her Cuban roots.
- Justina Machado as Penelope Alvarez
- Todd Grinnell as Schneider
- Isabella Gomez as Elena Alvarez
- Marcel Ruiz as Alex Alvarez
- Stephen Tobolowsky as Leslie Berkowitz
- Rita Moreno as Lydia Riera
- Erik Griffin as Carl
- Elena is made captain of the debate team.
- The jokes about Schneider's mustache are in reference to the original Dwayne Schneider and the mustache that made him easily recognized.
- Schneider mentions getting his five years sober chip.
- The Alvarezes have lived in their apartment for 10 months.
- According to their uniform polos, Alex and Elena attend St. Bibiana Academy.
- Elena is shown reading a book by or about Dorothy Parker and has pictures of Sonia Sotomayor and Hillary Clinton pinned to her wall.