Leonard McCoy payment for his appearance. In the "" episode "", McCoy mentions he has a daughter, Joanna. Although Chekov's friend Irina in the original series episode "The Way to Eden" was originally written as McCoy's daughter, it was changed before the episode was shot. In the 2009 "Star Trek" film, which takes place in an "alternate, parallel" reality, McCoy and Kirk become friends at Starfleet Academy, which McCoy joins after a divorce that he says "left [him] nothing but [his] bones." This line, improvised by Urban, explains how McCoy earned the nickname "Bones". McCoy later helps get Kirk posted aboard the
Vulcan (Star Trek) which removed the katra from McCoy and implanted it into Spock's regenerated body. Subsequently, Spock recovered, although it took some time to fully retrain his mind. Eventually, Spock's original memories apparently reasserted themselves, and he resumed his duties in Starfleet, albeit with trial and error before the 'old' Spock was completely back. The Vulcan language was the first alien language introduced in the "Star Trek" franchise, in the "Star Trek: The Original Series" episode "Amok Time", including the concept of “pon farr” (time of mating). Afterwards, one word was said in the episode "Journey to Babel" and some others in