Escalus attempts to convince Angelo that he should treat Claudio's case with mercy, but Angelo remains adamant. Calling in the provost, he orders him to see to Claudio's execution early the following morning.
At this point, Elbow, a constable, enters with the pimp Pompey and Froth, a gentleman bawd. Elbow accuses the two of some villainy. They respond to Escalus' questioning with an account of their activities so tedious and nonsensical that Angelo withdraws in disgust, leaving Escalus to judge the affair. The elder statesman at last excuses Pompey and Froth with a warning, and upon learning that Elbow has served in his office over seven years, Escalus determines to appoint a new constable in the ward.
The provost comes to Angelo to verify his order for Claudio's execution on the following morning. Angelo angrily reiterates the command.
Accompanied by Lucio, Isabella arrives to beg the deputy to reconsider her brother's sentence. Angelo stands firm but finally suggests that Isabella return on the following day. After her departure, his closing soliloquy reveals that he has been shaken by the temptation her maidenhood represents.
The duke, in his role as a friar, comes to the provost in the prison to offer his services to the prisoners there. Juliet enters, and the duke plays his role by questioning her repentance of the sin she has committed with Claudio. He then promises to go to Claudio "with instruction" before his execution.
Scene 4 opens with a soliloquy by Angelo on the subject of his inability to pray sincerely while tempted by Isabella's appeal. That lady then arrives to ask whether he has relented toward her brother. Angelo tells her subtly that Claudio must die unless she will yield her body to him. She fails to understand and Angelo speaks plainly. Isabella refuses, threatening to expose Angelo, who says he will deny her charges. Isabella leaves to tell Claudio he must prepare himself for his execution.
