It's Good to Be King

SG-1 finds that Harry Maybourne has become king on the planet where he took forced retirement. The planet is now under a Goa'uld threat, but Maybourne has found writings by a time-traveling Ancient that prophecy SG-1 will defeat the Goa'uld Ares. Ares sends Jaffa to the planet and comes in his mothership, but his forces are defeated by Daniel and Teal'c and his mothership is destroyed by O'Neill with the time traveling Puddle Jumper's weapons. Afterwards, Maybourne decides to remain on the planet with his people and his wives.