In Star Trek V: The Final Frontier (1989), McCoy (through the intervention of Spock's half-brother Sybok) reveals that he helped his father commit suicide to relieve him of his pain. Shortly after the suicide, a cure was found for his father's disease, and McCoy had carried the guilt about it with him until Sybok's intervention.

Admiral Leonard H. McCoy, MD was a male Human Starfleet officer of the 23rd and 24th centuries. He was an accomplished surgeon, physician, psychologist, and exobiologist, and was also considered an expert in space psychology. As chief medical officer, he served aboard the USS Enterprise and USS Enterprise -A for a combined twenty-seven years.

Star Trek V: The Final Frontier is a 1989 American science fiction film directed by William Shatner and based on the television series Star Trek created by Gene Roddenberry. It is the fifth installment in the Star Trek film series, and takes place shortly after the events of Star Trek IV: The Voyage Home (1986).

Great memorable quotes and script exchanges from the Star Trek V: The Final Frontier movie on Quotes.net

Jackson DeForest Kelley (January 20, 1920 – June 11, 1999) was an American actor, screenwriter, poet, and singer. He was known for his roles in film and television Westerns and achieved international fame as Dr. Leonard "Bones" McCoy of the USS Enterprise in the television and film series Star Trek (1966–1991). Kelley was born in Atlanta, Georgia.

Star Trek V dealt with end-of-life care & physician assisted death in a very sincere way. Dr. Leonard McCoy (with the aid of Sybok) experiences a flashback of…

McCOY: 'You'll have a great time, Bones. You'll enjoy your shore leave. You'll be able to relax.' You call this relaxing? I'm a nervous wreck. ... If I'm not careful I'll end up talking to myself. SPOCK: Greetings, Captain. KIRK: Spock! ... What are you doing in this neck of the woods? SPOCK: I have been monitoring your progress.

Leonard Horatio McCoy (also known as Leonard Edward McCoy) was a human Starfleet officer, best known for serving aboard the USS Enterprise (NCC-1701) and USS Enterprise -A as chief medical officer. He was given the nickname Sawbones McCoy, later shortend to Bones by James T. Kirk during their service together. (TOS novel: The Captain's Oath)

During pre-production meetings, screenwriter David Loughery jokingly proposed to have Commander Uhura appear as an erotic dancer in order to lure away the hostage takers from the Paradise compound. He was surprised when the producers approved of the idea right away.

Leonard Horatio McCoy, MD, was the storied chief medical officer of the USS Enterprise and USS Enterprise -A during the late 23rd century. He was born in 2227 in the "Old South" region of North America on Earth, the son of David and Eleanora McCoy.