What happens at the end of The Tempest?
The ending
In the betrothal of Ferdinand and Miranda, the rift between Naples and Milan is healed. Finally, Prospero grants Ariel her freedom and prepares to leave the island for Milan and her restored Dukedom.
The Tempest ends with a general sense of resolution and hope. After four acts in which Prospero uses magic to split up, disorient, and psychologically torture his enemies, in the final act he lures everyone to the same spot on the island and forgives Alonso and Antonio for their betrayal twelve years prior.
The conclusion of The Tempest shows Prospero regaining his dukedom, Ariel finding his freedom, and Caliban resigning himself once again to the authority of Prospero.
“At the happy ending of the Tempest, Prospero brings the kind back togeter with his son, and finds Miranda's true love and punishes the bad duke and frees Ariel and becomes a duke himself again. Everyone - except Caliban - is happy, and everyone is forgiven, and everyone is fine, and they all sail away on calm seas.
One of the most obvious themes of The Tempest is forgiveness and reconciliation and it can be said that it is at this point, Prospero decides to not pursue revenge but rather forgive his brother.
Prospero forgives Caliban and with a final request for calm seas and kind winds, he sets Ariel free. In his closing speech Prospero says he is finished with magic and asks the audience for his own forgiveness and freedom.
They weren't killed because Prospero was so well-loved by his people. Prospero and the baby were banished to sea on a used '83 Chevy Impala of a ship, which "even the rats left instinctively."
Her last appearance is in the play's final scene. After Prospero reveals himself to the assembled crowd he reveals the happy couple engaged in a game of chess. Miranda is teasing Ferdinand for cheating but admits that even if he is dishonest, she's more than happy to believe it for the love she bears for him.
Prospero chooses to give up his power. He releases the nobles, Caliban and Ariel, and promises to break the staff and drown the book that support him in his magic. Alonso also gives his blessing to the marriage of Ferdinand and Miranda, which means they will one day be King and Queen of Naples and Milan.
Antonio is forgiven and required to renounce his claims on Prospero's dukedom. While Alonso continues to mourn the loss of his son, Prospero relates that he too has lost his child, his daughter.
Who does Caliban get drunk with?
Stephan, the ship's butler, arrives, drinking and singing. He thinks the cloak hides a monster with four legs and feeds wine first into Caliban's mouth and then Trinculo's. Trinculo recognises Stephano and the two dance about joyfully.
In The Tempest there are two key themes. One is the value of freedom, including the idea that freedom can sometimes be found in service. Granting freedom to the spirit Ariel is an important feature of this theme. The other major theme is forgiveness.

Caliban is the main antagonist of the 1611 Shakespeare play The Tempest. He is the son of Sycorax and the devil, and lived on the island before the story's main character, Prospero, came with his daughter and claimed the land for them.
Mercy itself and frees all faults. Let your indulgence set me free.
Young Love in The Tempest
He sees Miranda as he is lamenting the death of his father and instantly falls in love with her beauty. She also falls in love with him, and Prospero decides that he wanted the union to happen.
Twelve years earlier Prospero was the Duke of Milan and Miranda was a princess. However, they were betrayed by his brother, Antonio, and the King of Naples, who sent Prospero and his daughter away on a rotten carcass of a boat.
Antonio betrayed his brother and stole the dukedom of Milan from him while he (Prospero) was studying. Being the loyal man that he is, Prospero did not expect his brother evil grab for power.
Prospero's deep sense of betrayal drives much of the plot of The Tempest. He tells Miranda in Act 1 Scene 2 the story of how his brother Antonio betrayed him, leading to their exile from Milan. It is Prospero's desire for revenge that brings Antonio, Alonso and the others to the island.
Shakespeare weaves the theme of treason throughout The Tempest. The first instance of treason occurred in the play's prehistory, when Antonio conspired with King Alonso to assassinate Prospero and succeed him as the new Duke of Milan. The attempt to kill Prospero was both political treason and brotherly betrayal.
Caliban drunkenly watches the happy reunion of Stefano and Trinculo and decides that Stefano is a god, dropped from heaven. Caliban swears devotion to this new "god," and the three leave together, amid Caliban's promises to find Stefano the best food on the island.
Who betrayed Caliban?
Caliban detests being a slave, but Prospero is powerful and likes to torture Caliban with terrible body cramps for misdeeds and protests. In Act 2, Scene 1, Antonio portrays his act of betrayal in his conversation with Sebastian.
Miranda is valuable to Prospero only as long as her virginity is retained. It is he who fiercely protects it, even from Ferdinand. He uses Miranda's virginity as a bait to lure Ferdinand into marrying her, as Miranda's virginity was a means to ensure that the paternity of Ferdinand's children is never questioned.
Miranda's primary value is in her virginity, which determines her worth on the marriage market. Upon seeing Miranda, Ferdinand quickly asks, "If you be maid or no?" (I. 2, 431). His immediate concern is to her chastity.
Shakespeare also develops the character of Miranda in this scene. The Tempest is remarkable for its absent women; Prospero's adored daughter is the only human female inhabitant on an island which, in the wake of the shipwreck, has been increasingly populated by men.
Character information
As the series progresses, Miranda's cynicism softens, particularly after she becomes pregnant by her on-again, off-again bartender boyfriend, Steve Brady, whom she eventually marries.