One thing you can say about Joe Goldberg (Penn Badgley) is that he’s very attentive. If you pique the interest of You’s lovesick protagonist, he’ll learn everything there is to know about you, from your daily schedule to your family’s history to your laptop password. We’ve seen it happen with Guinevere Beck (Elizabeth Lail), Love Quinn (Victoria Pedretti), Natalie Engler (Michaela McManus) and, most recently, Marienne Bellamy (Tati Gabrielle). 

But now it’s time for the observer (read: stalker) to become the observed. In Season 4, which premieres Feb. 9, Joe is living in London, working as a literature professor named Jonathan Moore when a serial killer develops an obsession with him. To help prepare you for the game of cat and mouse ahead, we’ve put together a quiz with 20 questions that will test how closely you watched Joe in the thriller’s first three seasons. We think Professor Moore would approve.