Having found a Federation colony of 100 people completely destroyed, Kirk and the Enterprise have to deal with a nearby Klingon vessel which they believe must be responsible for the colony's destruction. When the Klingon ship is disabled, they, in turn, assume they were attacked by the Enterprise. There is obvious tension between the Enterprise crew and its Klingon enemies. Unbeknown to Kirk and his Klingon counterpart, Kang, this is the work of an alien being that gets its energy from the friction and emotions between sentient beings. The natural animosities between the two parties feed its appetites. When the creature is beamed aboard the Enterprise, it purposely creates tension among the crew, to its benefit. The situation eventually forces Kirk and Kang to work together to defeat it. Written by
Did You Know?
Multiple spellings exist for Chekov's lost brother. It's a foreign variant of "Peter" that has been spelled as Piotr and Piotre. "Piotre" is an unusual spelling that can't readily be found anywhere (leastwise, not outside the 23rd century). "Piotr" does exist in European spellings, but it is Polish rather than Russian. The correct Russian spelling is "Pyotr." See more
As Kirk is giving instructions to Spock to scan for other ships, the orders are obviously and awkwardly spliced in from looping. See more
Filthy Klingon murderers! You killed my brother, Pyotr. The Archanis IV research outpost. A hundred peaceful people massacred! Just like you did here. My brother - you killed my brother!
And you volunteer to join him. That is loyalty.