Having received a Priority One distress call from an outlying space station, the Enterprise arrives to find they've 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. Their fortuitous presence, however, reveals both a problem with the wheat and a traitor on the space station. Written by
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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." See more
Chekov's drink repeatedly changes hands between shots. See more
[of the tribbles
They remind me of the lilies of the field. They toil not, neither do they spin. But they seem to eat a great deal. I see no practical use for them.
Does everything have to have a practical use for you? They're nice, they're soft and they're furry, and they make a pleasant sound.
So would an ermine violin, Doctor, but I see no advantage in having one.
Referenced in Sex Trek: The Man Eater