Lindsay Powell, a historian and author specializing in the Early Roman Imperial Period, uncovers the fascinating history of the Praetorian Guard. He discusses their evolution from personal bodyguards to a formidable military force, highlighting their crucial role in Roman power dynamics. Lindsay reveals how figures like Augustus and Tiberius shaped the Guard's functions and how their loyalty could influence political outcomes. The story of Sejanus's betrayal adds drama, emphasizing the complex relationship between power, military authority, and governance in ancient Rome.