Analysis of information sources in references of the Wikipedia article "The Trouble with Tribbles" in English language version.
If that matter had simply been dropped after that one episode was filmed, I would have chalked it up wryly to experience. But the "nice kid" did not drop it; "tribbles" (i.e. my "flat cats") have been exploited endlessly… Well that's one that did "larn me." Today if J. Christ phoned me on some matter of business, I would simply tell him: "See my agent.