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
The Star Trek Encyclopedia "Encyclopedia" mostly covers material from the "Star Trek" television series and the "Star Trek" motion pictures, which, according to Gene Roddenberry, are the extent of the "Star Trek" canon. It does include some completely original information. Given that this information is part of an officially licensed publication but not actually included in any "Star Trek" movie or television episode, its canonicity is disputed. Some entries in the "Encyclopedia" contain behind-the-scenes information, presented in italicized text. Unlike the "", the "Encyclopedia" makes no detailed speculations about "Star Trek" technology. The "Encyclopedia" was inspired by a previous book by the same writing