Study Guideplay

Measure for Measure: Act 4

by William Shakespeare

The recap, key beats, and evidence for Act 4, without reopening the whole book.

Section recap · 2 min read

What happens in Act 4.

The bed-trick is carried out. Mariana sleeps with Angelo in the dark, and Angelo still orders Claudio's execution anyway, sending for his head as proof. The Duke scrambles to save Claudio by arranging for a different prisoner's head to be sent instead. Escalus and Angelo believe Claudio is dead. The Duke prepares to return to Vienna as himself and sends letters ahead announcing his return. Isabella is told, falsely, that Claudio has been executed, so that her grief will be real when she confronts Angelo publicly. The act is mostly mechanics, but the Duke's manipulation of everyone around him becomes hard to ignore.

The beats worth remembering.

  • Angelo Orders Claudio's Death Anyway

    Even after getting what he wanted, Angelo decides Claudio must die because a living Claudio is a witness against him. This removes any doubt about Angelo's character. He is not weak or conflicted. He is calculating.

  • The Substitute Head

    The Duke arranges for the head of a pirate who died of natural causes to be sent to Angelo in place of Claudio's. Claudio is secretly kept alive. The plan works, but it depends on the Duke having authority even while pretending to have none.

  • Isabella Is Told Claudio Is Dead

    The Duke tells Isabella that Claudio was executed, even though he was not. He wants her grief to be genuine for the public confrontation ahead. This is a strange choice, and students often find it the hardest thing to defend about the Duke.

The moments you can actually use later.

  • Angelo's Letter Demanding Claudio's Execution

    Angelo sends a written order to the prison demanding Claudio be killed immediately, even though the agreement with Isabella has been fulfilled. The written order is concrete evidence of his intent to cover up his crime.

  • The Duke's Deception of Isabella

    The Duke tells Isabella that her brother is gone, knowing this is false, because he wants her emotional state to be unmanaged and authentic when she accuses Angelo in public. He frames this as being for her benefit, but it is also for the effectiveness of his plan.

What to carry forward.

  • Angelo's Decision to Kill Claudio Anyway Defines Him

    Up to this point, one could argue Angelo was a man who fell to temptation. After this decision, he is someone who commits a crime and then tries to eliminate the witness. That distinction matters for any argument about his guilt.

  • The Duke Is Not a Neutral Observer

    He has been pulling strings since Act 1. By Act 4, he is lying to Isabella for strategic reasons. Students should think about whether his methods are any cleaner than Angelo's.

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How this guide is built

This guide is built from the original text to help you get oriented fast. It is designed for recall, paper planning, and getting unstuck, but it is still a paraphrased guide, not a substitute for the reading itself. Double-check anything important before you turn in formal work.

Publisher

FCK.School / FCK.Ventures LLC

Last updated

Oct 8, 2026

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