The Vulcan Mind Meld
There are so many elements taken from Trek that have become culturally significant and are constantly referenced by Treekies, casual fans, and even those whom have never seen a single episode of Star Trek. One of the most well-known examples is that of the Vulcan mind meld.
The Vulcan mind meld is used a total of twelve times during Star Trek: The Original Series, but one of the most memorable instances of its use is when Spock performs the mind meld on the Horta near the end of the episode.
The mind meld is an intensely intimate and personal action for a Vulcan, and that is put on full display during Spock’s meld with the Horta. The emotional and possible even physical effects that it has on Spock are vary apparent. But It is because of Spock’s ability and willingness to meld with the Horta, that the creature’s true motivations are finally discovered.
Through the mind meld, the mining colony as well as the crew of the Enterprise, learn that rather then a ferocious monster, the Horta is, in fact, a protective mother, who will stop at nothing to protect her children and prevent the extinction of her species.
Spock performs a second mind meld on the Horta, so that he might explain to her a bargain that the mining colony wishes to make with her. The bargain states that the miners will leave the Horta eggs alone, and in return the mother Horta and its offspring with assist with the mining operation, utilizing their ability to tunnel through solid rock.
The moments where Spock uses the mind meld are absolute gems of the series and showcase the acting talents of Leonard Nimoy, possibly more then any other scenes in Star Trek: The Original Series, and the mind meld with the Horta is one of the best examples of that.