Late at night, Prince Hamlet met the Ghost. After being led by this ghost for a time, Hamlet refused to go any further and demanded an explanation for the Ghost's appearance. He replied to the young prince that, upon hearing his tale, that he would seek revenge for his father, for whom the Ghost claimed that he was the spirit of.
In 2266, the Karidian Company of Players performed the play in the USS Enterprise theater. In his last acting role, before his accidental death at the hands of his daughter Lenore Karidian, Anton Karidian portrayed the Ghost. (TOS: "The Conscience of the King")