★★★★★ December 29, 1967 Season 2 Episode 15
If you want to see where we are…and you missed a few…HERE is a list of the episodes in my index located at the top of my blog.
This show was written by Gene Roddenberry and David Gerrold
This could be the most famous episode of Star Trek…the one most known. A well-earned 5 Star episode for this one. They did something that the Twilight Zone never managed to do…to make a classic episode funny…and this one is.
The Enterprise responds to a priority one distress call on a space station but Kirk is far from impressed when he learns that the call was signaled by The Under Secretary for Agriculture Baris to guard some storage compartments of a new wheat hybrid. Reluctantly, Kirk agrees but only assigns two guards, giving his other available staff shore leave on the station.
The importance of the grain is brought home to him though when Starfleet commands him into action and the Klingons turn up on the station for “shore leave”. With all these pressures on him, peddler Cyrano Jones selling a strangely enchanting creature called a Tribble doesn’t even show up on his radar. Stanley Adams does a great job playing Cyrano Jones.

These Tribbles are adorable. There is only one problem with these furry creatures. They are born pregnant so you will never have just one. They soon fill the space station and soon The Enterprise. Everyone who sees them likes them…except for one race…and that would be The Klingons.
I have one request…WATCH the episode. I don’t want to write anymore and give anything else away. Some Star Trek fans say the episode is too lightweight…I disagree…it’s very entertaining and it’s nothing wrong with having an entertaining light episode. If I had to rank episodes…I would rank this 2nd behind The City On The Edge Of Tomorrow.
Deep Space 9 did an episode built around this episode. They go back in time and see Kirk, Spock, and the rest of the Enterprise when this happens. Check that one out…the effects are great…they put this crew with the Enterprise crew and it looks great.
From IMDB:
The scene in which Kirk is buried in an avalanche of tribbles took eight takes to get right. The tribbles were thrown into the hatch by members of the production crew. The crew members were not sure when to stop because they were unable to see the scene. This is why additional tribbles keep falling on Kirk one by one. William Shatner can be seen looking perplexed as to why more tribbles keep falling on him.
To create the one tribble moving on its own, the prop supervisor bought a battery powered toy dog and stripped it down to the mechanical works. Once recovered with fur including the toy legs, the prop moved on camera along the railing on the Enterprise bridge without wires or external assistance. The toy was so noisy all the dialogue in the scene had to be looped with ADR (re-recorded after shooting).
Tribbles have made subsequent appearances in numerous different versions of Star Trek, including important plot focuses in Star Trek: The Animated Series: More Tribbles, More Troubles (1973) and Star Trek: Deep Space Nine: Trials and Tribble-ations (1996), and cameo appearances in Star Trek III: The Search for Spock (1984), Star Trek Into Darkness (2013) and even Star Trek: Enterprise (2001) and Star Trek: Discovery (2017).
The noises that the tribbles make were a combination of dove coos, screech owl cries and air escaping from balloons.
During the famous “bar fight”, careful observers will note that while tables are broken, all the chairs remain intact. The tables were studio property: the chairs were rented, and if damaged would have to be paid for.
William Shatner recalled the great enjoyment all the cast had filming this episode. He noted, “The trouble we had with ‘Tribbles’ was [to] keep your straight face. It was just a lot of fun.”
Writer David Gerrold tried to pitch a sequel to this episode during the third season. But producer Fred Freiberger rejected it because he did not like the comedic tone of this episode. Gerrold’s idea eventually became an animated spin-off, Star Trek: The Animated Series: More Tribbles, More Troubles (1973).
When Dr. McCoy figures out that the Tribbles are in a perpetual state of being pregnant, this marks one of the very first instances on American TV of the use of that word. Just 15 years earlier, Desilu Productions, the original company behind “Star Trek”, was forbidden from using that word during I Love Lucy: Lucy Is Enceinte (1952), so the word “expecting” was used instead.
The pile of Tribbles near the end was actually created by gluing Tribble props around a large wire frame which William Shatner then stood in the middle of to give the illusion of mass numbers. In reality, there were only five hundred Tribbles made. This is obvious when you look at how the Tribbles are piled up, and none have landed on the floor at Spock’s feet.
James Doohan insisted on doing his own stunts in the barroom brawl.
In some scenes (and if you watch in high definition), a coffee stain is clearly visible on Spock’s velour shirt. Leonard Nimoy spilled his cup of coffee during lunch and there were no other costumes available for him.
William Campbell (Koloth) recalled that, after this episode was aired, his neighbour’s son consequently addressed his wife as “Mrs. Klingon”.
George Takei does not appear in this episode. For much of the second season, he was filming The Green Berets (1968). Many scenes written for Sulu were switched over to Chekov.
According to David Gerrold’s ‘The World of Star Trek’, Tribbles would be around the set for some time afterward, allowing for occurrences such as what was mentioned earlier or popping up in various other places as well for some months after the production of the episode.
This episode was nominated for a Hugo Award for Best Dramatic Presentation at the 1968 Science Fiction Convention.
According to Michael Okuda and Denise Okuda’s text commentary on this episode for the second season DVD set, the last fresh footage of the Enterprise was done for this episode. In every episode to follow, the shots of the ship were all stock footage.
The inspiration for the design of the tribbles came from a fluffy keyring.
At 37:10, you can get a rare glimpse of James Doohan’s missing finger as Scotty brings in an armful of Tribbies. Doohan lost it when he was wounded fighting with the Canadian forces on D-Day June 6, 1944.
The line in which Spock says that Kirk heard what Baris said, but could not believe his ears, was lifted directly from a Mad Magazine spoof of Star Trek (titled Star Blecch) that had just been published.
Captain Koloth pronounces his race, “Clingans”. As in Wilbur Clingan, Gene Roddenberry’s inspiration for the Klingons.
William Schallert appeared at one of the earliest Star Trek conventions, finding it rewarding and also confusing. Schallert recalled encountering many fans in person, who would react by calling and addressing him as Nilz Barris, and at the time he had completely forgotten the name of the character he played.
This is the first time in the series the Klingon language is mentioned. It is called “Klingonese” in the script and the DVD-subtitles. However, because actor Michael Pataki began to laugh at the end of the word, and cut himself off before finishing his consonants, the word is heard as “Klingonee”. It is spelled “Klingoni” in the Netflix subtitles.
In his first meeting with the Klingon commander, Koloth cites authority to shore leave rights as authorized by the Organian Treaty. This occurred in Star Trek: Errand of Mercy (1967) when the Organians prevented a war between the Federation and the Klingon Empire. The Treaty of Organia dictates interactions between the two sides to prevent another chance of war.
The bar set, including the bartender’s costume, is recycled from Star Trek: Court Martial (1967), with slight modifications, mostly in decoration.
Writer David Gerrold intended to play the crewman who is with Scott and Chekov when the barroom brawl breaks out, but the role went to stuntman Paul Baxley instead.
Despite this episode’s popularity, producer Robert H. Justman wrote in his book “Inside Star Trek: The Real Story” that he never liked this episode. Justman felt that the humor was too over-the-top and the show became a parody of itself.
Initially Leonard Nimoy was not a fan of the episode as he felt it to be frivolous. Its deepening reputation as one of the classics of The Original Series as the years went on helped him change his mind.
In David Gerrold’s book “The Trouble with Tribbles”, he quoted a memo he wrote when the show was being prepared suggesting that the character of Cyrano Jones be changed from an unscrupulous trader to an old man who was too befuddled to realize what he was doing by importing Tribbles into a space station and on a star ship. “What a role for Boris Karloff,” Gerrold wrote in his memo. In the book, Gerrold expressed regret he didn’t pursue this idea further because it would have gotten the legendary Karloff onto Star Trek.
William Campbell makes his second appearance as an alien. His first was as Trelane in “The Squire of Gothos”, and this role as the Klingon Captain Koloth. The role of Koloth was intended as a recurring character, but the next time a Klingon was needed, Campbell was unavailable and a different character and actor was cast.
The storyline greatly resembles one subplot in ‘The Rolling Stones’, a 1952 novel by Robert A. Heinlein. Gene Roddenberry and Heinlein made an undisclosed copyright agreement before The Trouble With Tribbles aired. Heinlein conceded to David Gerrold that both he and Gerrold possibly “owed something to Ellis Parker Butler”, author of the short story ‘Pigs is Pigs’ (According to Bjo Trimble, this episode is based upon said short story, ‘Pigs Is Pigs’, although Gerrold’s first-hand account only acknowledges the similarities but does not specifically cite the short story as “the basis” for this episode, and, as the author, he should know). See also Star Trek: Charlie X (1966) and Star Trek: Operation — Annihilate! (1967), which have strong Heinlein similarities.
This is listed as one of the “Ten Essential Episodes” of TOS in the 2008 reference book “Star Trek 101” by Paula M. Block and Terry J. Erdmann.
The producers of the Remastered Edition insist to everyone that all shots of the station and ships are brand-new and not reused from Star Trek: Deep Space Nine: Trials and Tribble-ations (1996) as had been rumored. Comparisons reveal that no space shots were reused.
William Campbell returned to the role of Koloth 27 years later in Star Trek: Deep Space Nine: Blood Oath (1994).
Spock’s estimate of the tribble population (1,771,561) is mathematically accurate, given the explanation: “That’s assuming one tribble, multiplying with an average litter of 10, producing a new generation every 12 hours over a period of three days.” The population growth, counting by 12-hour intervals, would go from 1 tribble to 11; 121; 1,331; 14,641; 161,051; 1,771,561. It also assumes that tribbles have a life expectancy of at least 3 days, which is possible but not certain; a relatively short life expectancy would tally with their high metabolism, growth rate, and “multiplicative proclivities.”
On the DVD commentary for Star Trek: The Animated Series: More Tribbles, More Troubles (1973), David Gerrold, shares a story of meeting a fan visiting the Filmation Associates facility who strongly urged him to write a sequel to the original Trouble with Tribbles. He said despite telling the fan three times he had already done so and it “was in production,” the fan continued to pitch his ideas for the sequel. After the animated sequel aired, he got a letter forwarded by NBC, from that same fan, saying he wasn’t asking for money only “asking for some of the credit.” Gerrold wrote back to him, telling him “asking for half the credit is asking for half the money,” and telling the fan that he didn’t hear him say he had already written it. He explained further to the fan that this is the reason why people in the industry, especially writers, try to avoid talking to fans and amateurs because if anything even just similar is later produced, it would be deemed as “stolen.”
In the bar set, recycled from Star Trek: Court Martial (1967), many tribbles were made out of carpet as background. Most visible versions were made from off-cuts from fur garments, as revealed in the book to accompany episode. The tribbles that move had mechanical toys placed inside them.
When Kirk remarks to both Uhura and Chekov that they didn’t waste any time taking shore leave, Uhura replies, “And how often do I take shore leave?” Star Trek: Shore Leave (1966), another episode with a comedic tone, premiered exactly one year earlier. Although Uhura was in that episode, she spent it, at least onscreen, aboard the Enterprise instead of the amusement planet where some of the other crewmembers were taking shore leave.
Summary
Having received a Priority One distress call from an outlying space station, the Enterprise arrives to find they have been summoned there by a Federation commissioner merely to protect a shipment of seeds meant to sow wheat on Sherman’s planet. The planet is also coveted by the Klingons, who are taking shore leave at the station. The trouble arises with tribbles – small furry creatures that seem to multiply without end. However, their fortuitous presence reveals both a problem with the wheat and a traitor on the space station.
CAST
William Shatner…James T. Kirk
Leonard Nimoy…Mr. Spock
DeForest Kelley…Dr. McCoy
William Schallert…Nilz Baris
William Campbell…Koloth
Stanley Adams…Cyrano Jones
Whit Bissell…Lurry
James Doohan…Scott
Nichelle Nichols…Uhura
Michael Pataki…Korax
Ed Reimers…Admiral Fitzpatrick
Walter Koenig…Chekov
Charlie Brill…Arne Darvin
Paul Baxley…Freeman
David L. Ross…Guard
Guy Raymond…K-7 Bartender

I don’t know if it’s the most famous episode, but I think it’s the only one I know by it’s title
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It probably IS the most famous episode and it’s worth it.
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I always liked this episode. The Mogwai were also very cute creatures, but they transformed into gremlins, and I am sure that this movie was influenced by the Star Trek Tribbles, because they kept multiplying.
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I’m sure it was…it makes sense completely.
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My favorite episode. Another little piece of trivia: Hallmark released a Keepsake ornament in 2008. Tiny tribbles fall on Kirk when you push a button!
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Oh wow….I will have to look that one up! and keep an eye out for it in shops we go to.
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I can’t wait to get to this one in my rewatch.
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I never get tired of this one.
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This does look like an amazing episode, so I will try to hunt it down!
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This would be a great starter episode for someone also.
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I remember this one, really I think one of the best. There have to be more pop culture references to tribbles than anything else!
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Yes this is the most famous I would say…and it’s well deserved. They mixed comedy and drama really well.
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I guess I’ll be one of the few who don’t go for this one. There had been a craze for Gonks- similar in size to Tribbles- a couple of years back. It was a kitschy craze like, say hula hoops- you couldn’t go anywhere without seeing an awww-cute-as-hell Gonk plonked on somewhere out of place like, say, our first year just out of Teachers College new teachers* desk, or piled on shop counters, or trolling around on car back windows shelves. Couldn’t stand ’em, so Tribbles got dismissed in the same manner.
*She was so cute!
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LOL…ok…absolutely NO tribbles for obbverse! Looking past that…and I know it’s hard…the one thing that Star Trek could do better than The Twilight Zone…mixing comedy and drama.
I just looked up a Gonk…I won’t say it!
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I agree with the humour aspect-I’m all for humour, it just didn’t work for me. I got issues!
Yeah, Gonks- what a gross lapse in taste they wuz.
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Nah….hey I get it. Many popular songs and shows I don’t like that everyone else does…I wish you on the issues
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So much good trivia you found on this episode. It definitely is the most well-known of TOS episodes. I commend whoever decided to name it that. Funny quote about the trouble with by Shatner on how it was difficult not to laugh. I’m with you on why the heck not have a funny episode or more than one. There was always humorous reparte’ going on between Kirk, Spock, Bones, et al anyway so the point it moot. Question about original vs CGI revamps: what are your thoughts on it? I think they need to leave the original as it is. I’m hoping original, un-cgi-ed episodes are available? It’s like Ted Turner trying to colorize B&W movies to me.
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That is what I have…the unedited ones. I don’t think they needed it but I have to say….at least they don’t change the story (like Star Wars) and they only enhance space things….BUT…most of the time I liked the original better on the way it looked!
Oh…nothing is worse than It’s A Wonderful Life in color to me.
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Great episode and one of the only ones I’ve ever seen.
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Classic episode!
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