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
Did You Know?
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 (re-recorded after shooting). See more
When Kirk and Scott discuss the fight aboard the space station, Kirk says, "What caused it, Scotty?" Right at the beginning of the next shot, we can see him clearly repeating the line, but we don't hear his voice saying it a second time. See more
Surely you must have realized what would happen if you removed the tribbles from their predator-filled environment into an environment where their natural multiplicative proclivities would have no restraining factors.
[all in one breath
Well, of cour... What did you say?
[irritated but patient
By removing the tribbles from their natural habitat, you have, so to speak, removed the cork from the bottle and allowed the genie to escape.