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
Timeline of Star Trek to find he had discovered the theory behind warp drive. The "Icarus" then relayed its findings back to Earth, the first prototype warp ship was launched in 2055. The "Star Trek Chronology" does not hold with this theory, and asserts that Cochrane was an Earth native, who moved to Alpha Centauri later in life (even in "Metamorphosis", before Cochrane identifying himself to the landing party, Dr. McCoy had taken a tricorder scan and determined him to be human). The first edition "Chronology" notes that Cochrane's invention of warp drive must have been at least 200 years before "Where No Man