Stargate SG-1 (1997)

S8E13 It's Good to Be King

Title: A Royal Encounter Plot: SG-1 arrives on a planet facing an imminent attack from the Goa'uld, but to their surprise, they find that the reigning monarch is none other than Earth's own Harry Maybourne. As they navigate the challenges of the impending invasion, they must also confront the complexities of Maybourne's rule and his unexpected transformation into a king.