First, Hamlet's father was murdered by King Claudius. Hamlet's ghost appeared in Denmark to ask for revenge.
Hamlet did not fully take the challenge to seek revenge on Claudius, he wanted to have a proof that the ghost was right about Claudius killing him. Hamlet puts up play to see how Claudius would react towards it. During the play Claudius proved that he had killed Hamlet’s father. The characters declares” the king rise/what, frighted with false fire?”(III ii 291-292). Thus, Claudius stood up and leave, this is the point Hamlet found out the ghost was right about Claudius killed him. Hamlet has the proof that Claudius killed his dad now he's eager to take revenge on him.
Moreover, Hamlet goes after Claudius which makes him got confused between Polonius and Claudius. Hamlet accidentally kills Polonius. Laertes seek revenge on Hamlet because Hamlet murdered his father. Laertes' reaction to his father's death explores the theme of revenge.
Laertes' need for revenge is driven by his anger and his father’s death. Laertes is determined to seek vengeance by anger “I am satisfied in nature, / Whose motive, in this case should stir me most / To my revenge"(V ii 259-261). For this reason, Laertes feels like revenge is the best way to grief his father’s death. Laertes' reaction to his father's death exposes revenge as a means. He took his anger by going after Hamlet. Shakespeare uses Laertes' reactions in Hamlet to explore the theme of revenge. Third, Laertes confronted Hamlet about his father's death in Ophelia’s funeral then they got into a fight. Throughout the fight there was multiple people died. Hamlet command the Claudius to drink the poison instead Gertrude drink it and she dies. Laertes got stab with the poisoned sword and dies. Then Hamlet stabs Claudius with the poisoned sword and commands “Drink off this potion. Is here? (V ii 357). He forces him to drink the rest of the poisoned wine. Claudius dies, and Hamlet dies immediately. They all got their revenge. The reactions of Hamlet, Laertes allow William Shakespeare to justified the theme of revenge in Hamlet. Hamlet wanted retribution on Claudius because he killed his father. Laertes wanted retribution on Hamlet because Hamlet killed Polonius. In Hamlet, the main character questioned revenge, to the point where lives are put in danger. Hamlet, Laertes, and Claudius bring the theme of revenge to life, revealing how your feelings can get in the way of putting people's lives in danger.