The Netflix psychological thriller starring Penn Badgley captivated viewers from the start with its leading man Joe Goldberg, a dangerously charming book enthusiast who became infatuated and obscenely obsessed with aspiring writer Guinevere Beck.

He's been a profound experience for me," Badgley tells PEOPLE exclusively With Netflix's You coming to an end, Penn Badgley is looking back on the series — and the character — that encompassed his 30s.

In an interview, Penn Badgley breaks down the series finale of Netflix's You and why Joe Goldberg's downfall had to happen the way it did.