The Earl of Douglas is a Scottish lord warring on Henry IV, who was badly beaten by Hotspur.
When the latter decides to rebel against the King, he approaches Douglas through his captured son and convinces Douglas to join with him to fight the English monarch. Extremely brave, he is nevertheless discomfited by the news that Glendower will be unable to join the other rebels in time. He spends the battle attempting to kill Henry IV, who has disguised a great number of people as him; when Douglas kills Blunt as one of them, he swears that he would not have bothered if he had not thought the man to be the King. Finally meeting the real monarch, he is on the verge of beating him when Prince Harry comes to his father’s rescue. Refusing to acknowledge even the existence of the concept of fear, he nevertheless flees after a brief fight with the prince. He also does not seem to notice that Falstaff is merely playing dead. After the battle, Prince Harry lets him go out of respect for his valor.