Laredo episode "The Sound of Terror". After refusing Roddenberry's 1964 offer to play Spock, Kelley played Dr. Leonard "Bones" McCoy from 1966 to 1969 in Star Trek. He reprised the character in a voice-over role in Star Trek: The Animated Series (1973–74), and the first six Star Trek motion pictures (1979 to 1991). In 1987, he also had a cameo in "Encounter at Farpoint", the first episode of Star Trek: The Next Generation, as Admiral Leonard McCoy, Starfleet Surgeon General Emeritus. Several aspects of Kelley's background became part of McCoy's characterization, including his pronunciation of "nuclear" as "nucular". Kelley became a good friend of Star Trek castmates William Shatner and Leonard Nimoy, from their first meeting in 1964. During Trek'''s first season, Kelley's name was listed in the end credits along with the rest of the cast. Only Shatner and Nimoy were listed in the opening credits. As Kelley's role grew in importance during the first season, he received a pay raise to about $2,500 per episode and received third billing starting in the second season after Nimoy. Despite the show's recognition of Kelley as one of its stars, he was frustrated by the greater attention that Shatner received as its lead actor and that Nimoy received because of "Spockamania" among fans.Shy by his own admission, Kelley was the only cast member of the original Star Trek series program never to have written or published an autobiography; the authorized biography From Sawdust to Stardust (2005) was written posthumously by Terry Lee Rioux of Lamar University in Beaumont, Texas. Kelley regarded "The Empath" as his favorite Star Trek television episode. Later career After Star Trek was cancelled in 1969, Kelley found himself a victim of the very typecasting he had so feared. In 1972, he was cast in the horror film Night of the Lepus. After that, Kelley made occasional appearances on television and in film, but essentially went into de facto retirement, other than playing McCoy in the Star Trek film series. By 1978, he was earning up to $50,000 ($ today) annually from appearances at Star Trek conventions. Like other Star Trek actors, Kelley received little of the enormous profits that the franchise generated for Paramount, until Nimoy, as executive producer, helped arrange for Kelley to be paid $1 million for Star Trek VI: The Undiscovered Country (1991), which was his final live-action film appearance. In 1987, he appeared