John Henry Holliday, better known as Doc Holliday, was a dentist and later a gambler, gunfighter, and a close friend and associate of lawman Wyatt Earp. Holliday is best known for his role in the events surrounding and his participation in the Gunfight at the O.K. Corral in Tombstone, Arizona. 36 years old, tall, handsome, black hair, brown eyes. He is great with a gun, and has tuberculosis.