Jackson DeForest Kelley, known to colleagues as "Dee", was an American actor, screenwriter, poet, and singer known for his roles in Westerns and as Dr. Leonard "Bones" McCoy of the USS Enterprise in the television and film series Star Trek.

What happened to McCoy in Star Trek?

McCoy retired from Starfleet after the five-year mission was completed but he was drafted back into service using a little-known 'reactivation clause', just in time for Kirk to command the Enterprise against V'Ger in Star Trek: The Motion Picture.

Does Dr McCoy appear in Star Trek Next Generation?

When Star Trek: The Next Generation debuted on TV, it had a surprise guest star: DeForest Kelley, Dr. Leonard "Bones" McCoy from the original series (check out video of his appearance). Kelley was helping to bridge the two series, literally handing over the latest USS Enterprise to the next generation.