What happens
The Duke, disguised as a friar, visits the prison to minister to the afflicted. He meets Juliet, who is pregnant with Claudio's child and awaits her own fate. The Duke examines her penitence, asking whether she truly regrets her sin or merely the shame it has brought. Juliet confesses genuine remorse and accepts her punishment. The Duke departs, learning that Claudio must die tomorrow.
Why it matters
This scene establishes the Duke's pastoral role and his ability to perceive truth beneath surfaces. While the Provost describes Juliet as damaged by her own youth, the Duke's questioning reveals something more complex: she loves Claudio, regrets the sin equally, and bears her shame with dignity rather than self-pity. His distinction between repenting 'as it is an evil' and repenting merely 'because the sin hath brought you to this shame' cuts to the heart of genuine versus performative morality. This becomes crucial later when Isabella's virtue will be tested—the Duke is learning to recognize authentic penitence, which will inform how he judges everyone in the play.
The scene also deepens our sense of the Duke's knowledge and his hidden power. He confirms that Claudio dies tomorrow, yet offers no immediate intervention. Instead, he moves through the prison like a confessor, gathering information and assessing character. His calm acceptance of Juliet's situation—neither condemning nor absolving—suggests he is orchestrating events rather than reacting to them. The contrast between Juliet's genuine penitence and what we will soon see of Angelo's hidden lust establishes a moral framework: the play will measure characters not by their position or appearance, but by the alignment between their words, their hearts, and their actions.