 How does Retief first manage to arrange an interview/interrogation with Groacians officials?
I "The Consul for the Terrestrial States," Retief said, "presents his compliments, et cetera, to the Ministry of Culture of the Groacian Autonomy, and with reference to the Ministry's invitation to attend a recital of interpretive grimacing, has the honor to express regret that he will be unable—" "You can't turn this invitation down," Administrative Assistant Meuhl said flatly. "Whaffle left here three months ago," Retief said, "leaving me in charge." "You've been here on Groac for four years, Miss Meuhl. "Mr. Retief, those are just the sort of questions we avoid with the Groaci. Outside, Retief stood for a moment looking across at the deeply carved windowless stucco facades lining the street, then started off in the direction of the Terrestrial Consulate General. An elaborate one picked out in pinkish paint seemed to indicate the Groacian equivalent of a bar. A Groacian bartender was dispensing clay pots of alcoholic drink from the bar-pit at the center of the room. He looked at Retief and froze in mid-motion, a metal tube poised over a waiting pot. "To enjoy a cooling drink," Retief said in Groacian, squatting down at the edge of the pit. Retief backed into the opening to a narrow crossway and offered further verbal familiarities to the drunken local, who followed, furious. Retief backed, rounded a corner into a narrow alley-like passage, deserted, silent ... except for the following Groacian. Two Groaci wearing heavy eye-shields and elaborate crest ornaments indicative of rank rose as Retief entered the room. "I wash my hands—" "Just keep that recorder going," Retief snapped. "You reopen an old wound, Mr. Consul. I understand that a Terrestrial task force stood off Groac and sent a delegation down to ask questions. It was just after the task force paid its visit, and before the arrival of the first Terrestrial diplomatic mission." It has outdone itself—" "—to keep the Terrestrial consul and his staff in the dark," Retief said. This continual round of culture; no social contacts outside the diplomatic circle; no travel permits to visit out-lying districts, or your satellite—" "Enough!" "I can talk no more of this matter—" "You'll talk to me, or there'll be a task force here in five days to do the talking," Retief said. After being securely caged, they were exhibited to the gentle Groaci public.
 He gets into a bar fight, prompting an investigation and thus a visit from a Groacian government officials. Retief flips their interrogation when he begins to ask them the questions he needs answered.
 Retief tricks Miss Meuhl into luring Groacian officials to their office. Once they arrive, Retief blackmails them with information he stole from a bar tender.  He gets into a bar fight, prompting an investigation and thus a visit from a Groacian government officials. Retief flips their interrogation when he begins to ask them the questions he needs answered.  He breaks into their place of business and demands he be met. At first the receptionist doesn’t let him in, but eventually breaks.  He steals vital information from the Groacian archives and plans to use it for blackmail. Then he gets into a fight with a police officer, prompting Groacian officials to visit his office. He blackmails them for info when they arrive.