Episode Title: "THE TROUBLE WITH TRIBBLES"
Production Number: 42
Original Air Date: 12-29-67
Stardates: 4523.3, 4524.2
The U.S.S. Enterprise is in a region of disputed space, where both the Klingon Empire and the Federation claim Sherman's Planet. Under the terms of the Organian peace treaty, one side must prove that it can develop the planet most efficiently.
The Enterprise receives an emergency call from nearby Deep Space Station K-7, issued by Nilz Baris, the Federation undersecretary in charge of agricultural affairs in this quadrant, who has come from Earth to oversee the development of Sherman's Planet.
Baris wants the Enterprise to ensure the security of a shipment of several tons of quadrotriticale, a high-yield hybrid, which is the only Earth grain that will grow on Sherman's Planet. Baris thinks that Klingon agents may try to sabotage the grain shipment. Admiral Fitzpatrick at Starfleet Command orders Captain Kirk to aid Baris in protecting the grain and the development project on Sherman's Planet.
While aboard Deep Space Station K-7, the Enterprise crew acquires some small alien animals called tribbles from a trader named Cyrano Jones. The tribbles reproduce quickly and rapidly infest both the Enterprise and the space station.
A Klingon battle cruiser approaches the station, requesting shore leave for its crew. Under terms of the Organian peace treaty, Kirk allows Captain Koloth and his crew to visit the station in limited numbers, over the objections of Undersecretary Nilz Baris.
After the Enterprise crew discovers that the shipment of grain has been poisoned, Arne Darvin, the assistant to Undersecretary Baris, admits he is a Klingon spy and poisoned the grain.
Captain Kirk orders Captain Koloth and his Klingons to leave Federation space, and orders Cyrano Jones to remove all tribbles infesting the space station, which Commander Spock estimates will take 17.9 years. Lt. Commander Scott transports all the tribbles from the Enterprise into the engine room of the Klingon battle cruiser before it goes into warp.
Factoid: The Battle of Donatu Five was fought nearby 23 Solar years ago.
Factoid: Quadrotriticale is a perennial, four-lobed hybrid of wheat and rye.
Factoid: Klingons and tribbles have a natural dislike of each other.
Factoid: Regulan blood worms are soft and shapeless.
Factoid: A Klingon compares Captain Kirk to a Denebian slime devil.
Guest Characters: *Admiral Fitzpatrick, *Cyrano Jones, Lt. Leslie, *Captain Koloth, *'Arne Darvin'
Alien Races: Klingons, *Tribbles
KEY: [brackets]=illusions *star=first appearance