Complex sentence: As a matter of fact, a jealous skyway patrol lieutenant wanted to have Jenny permanently shut down, only to succeed in being demoted to private, until, in "A Spoonful of Mayhem", he succeeded in being fired from the force.
Split into simpler sentences: As a matter of fact, a jealous skyway patrol lieutenant wanted to have Jenny permanently shut down, only to succeed in being demoted to private. He kept trying to have Jenny shut down until, in "A Spoonful of Mayhem", he succeeded in being fired from the force.