Marcus Aurelius broke with the adoptive succession system that had served Rome for nearly a century, choosing his biological son Commodus as heir. This episode examines why the philosopher-emperor made that fateful decision, despite knowing Commodus' flaws. We explore Commodus' early co-rule, his disastrous solo reign, and how his assassination triggered the Year of the Five Emperors. Drawing on Cassius Dio, Herodian, and the Historia Augusta, we look at Commodus' megalomania, his renaming of Rome to Colonia Commodiana, and his bizarre self-identification as Hercules. We also consider Marcus' options: who else could he have chosen? Was there a better candidate? And we ask whether Marcus' Stoic commitment to family duty blinded him to political reality. A fresh angle for the show, avoiding previous topics like the Marcomannic Wars, the Antonine Plague, or Meditations.