Three years after applying, Ronny is provisionally hired by United Planets and sent on a perplexing chase from planet to planet, trying to catch an interstellar saboteur. His quarry is subverting the peace and order UP was created to maintain.
Ronny Bronston has dreamed all his life of getting a United Planets job that would take him off-world. He finally gets the opportunity when he is given a provisional assignment with Bureau of Investigation, Section G. But will he be able to complete his assignment and find the elusive Tommy Paine?
Ultima Thule was first published in Analog Science Fact & Fiction March 1961