King Duncan praises Macbeth and Banquo and calls for the execution of the Thane of Cawdor.
Characters: 
Duncan

The King of Scotland. He awaits news from the front of his army’s success against a rebellion by the Norwegian King and traitorous Thane of Cawdor.

Malcolm

Duncan's eldest son.

Donalbain

Duncan's younger son.

Lennox

A Scottish lord who serves Duncan.

Ross

A Scottish Lord who often acts as messenger. He brings Duncan news of the victory and Macbeth’s personal valor.

Angus

A Scottish Lord who serves Duncan.

Sergeant

An injured soldier in Duncan’s army who brings news from the front of the rebellion.

Attendants

Courtiers who attend to King Duncan.

Scene Summary: 

In the Scottish court, King Duncan is rehashing a recent battle with his sons and other noblemen. He’s hoping a wounded Captain can give him the scoop on what went down on the battlefield. The captain tells them that “brave Macbeth” and Banquo were the heroes of the hour, and then he's promptly hauled off to the doctor. In walk Ross and Angus, two Scottish nobles (also known as thanes). Ross brings another tale of Macbeth’s battle skills: apparently he bested the King of Norway, who was being helped by the traitorous Thane of Cawdor. Duncan may be pleased to hear of Macbeth’s awesome feats, but he’s pretty peeved that the Thane of Cawdor has betrayed him. Duncan demands the Thane of Cawdor's execution and plans to hand over the Thane's titles to our main man, Macbeth.