The STAR TREK PHYSICIAN is Dr. Leonard McCoy, commonly referred to as 'BONES'. He is a fictional character in the Star Trek media franchise. He is portrayed by DeForest Kelley in the original Star Trek series and in the first seven Star Trek films. He is the Chief Medical Officer of the USS Enterprise, serving under Captain James T. Kirk. He is known for his often cantankerous and emotional personality, as well as his famous catchphrase, 'I'm a doctor, not a _____.'