Hamlet and friends encounter the ghost.
Characters: 
Hamlet

The Prince of Denmark has come to the battlements of Elsinore hoping to see the ghost of his father.

Horatio

Hamlet’s friend has come with Hamlet to watch for the ghost.

Marcellus

A soldier who has accompanied Hamlet to watch for the ghost.

Ghost

The mysterious figure that looks like the late king. It beckons for Hamlet to speak with it.

Scene Summary: 

During their stakeout at the castle, Hamlet, Horatio, and Marcellus spot the ghost, who clearly wants to talk to Hamlet. Despite his friends’ protests, Hamlet leaves with the ghost for a private chat.