Moordale is welcoming a new headteacher. A trailer has dropped for “Sex Education’s” third season and sees “Girls” alumna Jemima Kirke vowing to transform the reputation and culture of the so-called “sex school.” “Seems there are some students here who get a kick out of giving us a bad name. It changes today,” Hope (Kirke) announces. The new faculty member adds, “There’s a battle happening for the sexual health of our teenagers. I will get Moordale back on track.”

Students are in dire need of Otis (Asa Butterfield) and Maeve’s (Emma Mackey) sex education services, but the pair don’t appear to be on good terms. Things are looking considerably brighter for Eric (Ncuti Gatwa) and Steve (Chris Jenks), who are going public with their relationship.

“Sex Education” returns to Netflix September 17. Laurie Nunn created the critically acclaimed comedy.