intense episode in which a shuttle craft mission lead by spock crash land on a most unpleasant world . indeed and the danger pose by it hostile environment lead to a hostile crew a spock find his leadership ability call into question . hal and bog in their review have already do a fine job of explore how the vulcan logical approach to the crisis prove ineffective in deal with the stress out human under his command . the only thing to add might be that spock and at time and display an almost human surliness that seem very un vulcan . but and since this be a first season episode and it may have be film before leonard nimoy have fully come to understand his character and the proper way to play him and ( for example and he be still speak with that put on british accent like when he pronounce the word command a commond ) . clearly and this be not the more controlled mr. spock we would see in later episode like the doomsday machine and but it still a good performance and the script provide an interesting set of problem to watch the usually unflappable character try and overcome . a if crash land wasn not bad enough and the primate that live on the planet be a neat addition to further complicate spock bad day . glimpse more than they be see ( and a wise move and too a the only creature show up close look like it wear a fur dress ) and these hairy monster prowl about in the fog make hissing noise and echo roar . they attack with huge spear and and in one scene maul a comparatively puny human to death . thoroughly nasty and their presence in the story lead to a neat scene on the enterprise bridge a kirk hear the report of return search party leader . appear on a viewer screen bruise and bedraggle in a torn up uniform and lt. commander kelowitz relate how his team be attack by creature similar to one discover on hanson planet and only much and much big . ten maybe twelve foot in height . clearly exhausted and maybe a touch traumatized and kelowitz caution kirk that if the miss shuttle craft crew be on that planet . well and he doesn not have to finish the sentence for kirk to get his meaning . it an effective little touch that cast a shadow of dread on the possible fate of kirk miss crew member . in fact they should have use this seldom see character of kelowitz more often a he would have make a great running feature . like scotty dire warning about the condition of the ship engine and or those red shirted security men who be always first to bite the dust and you would know the situation be dire if kelowitz show up with a new batch of bruise and another alarm report for kirk .