Recaps

Peeves announced that Sirius Black had attacked the Fat Lady’s portrait, and Dumbledore kept the students in the Great Hall while the staff searched the Castle. Su Er joined Hermione, Harry, and Ron for the night, reconciled with Hermione, and realized that Scabbers’ presence meant Black had failed to find his target.

• Peeves told Dumbledore that Sirius Black had damaged the Fat Lady’s portrait and that she was hiding on the fifth floor.
• Dumbledore sent McGonagall to Gryffindor Tower and Filch to find the Fat Lady, then ordered the students to remain in the Great Hall overnight.
• Dumbledore conjured sleeping bags, and Percy organized the students and the prefects to guard the Hall.
• Su Er joined Hermione, Harry, and Ron, apologized to Hermione, and persuaded her to forgive him.
• Ron said he had brought Scabbers with him, and Su Er inferred that Black had come away empty-handed.

Su Er tested his theory that Sirius Black was hiding in the Room of Requirement, while students debated how Black had entered Hogwarts. The chapter ended with Su Er setting a concealed recording device near the room and Harry sitting silently in the library.

• Su Er overheard Dumbledore and Snape discuss Black’s disappearance and heard Dumbledore promise that no Dementor would enter the castle.
• Su Er found that the Room of Requirement did not appear, which led him to suspect Black was hiding inside it.
• Su Er concealed an activated Remembrall near the Room of Requirement to record whoever was inside.
• Hannah, Neville, Ron, and Hermione debated how Black had entered Hogwarts in the library, until Madam Pince stopped their discussion.
• Harry stared blankly at his parchment while the other students returned to studying.

Su Er used the Remembrall to confirm that Sirius Black had been hiding in the Room of Requirement, then planned to use the Marauder's Map to track Peter Pettigrew and arrange for him to be caught. He persuaded George and Fred to take him to Hogsmeade, leaving Harry and Hermione alarmed by his joking explanation.

• Su Er watched the Remembrall's recording and saw Black emerge from a hidden door in the Castle as a black dog.
• Su Er considered showing Dumbledore the evidence, but decided to wait for a chance to catch Peter Pettigrew and clear Black's name.
• Su Er decided to borrow the Marauder's Map from George and Fred so he could monitor Peter's movements.
• Su Er persuaded George and Fred to take him to Hogsmeade after dinner by implying he had a secret reason to go.
• When Harry asked what he planned to do, Su Er joked that he would blow up Hogwarts with Ron's brothers, shocking Harry and Hermione.

Su Er met Fred and George to learn how they had secretly traveled to Hogsmeade, and they revealed the Marauder’s Map. They gave it to him, and the three set off to use one of its secret passages.

• Ron believed Su Er’s story, but Harry and Hermione realized Su Er had been joking about his plan.
• Su Er met Fred and George in a hidden room, where they explained how they had found the Marauder’s Map in Filch’s office.
• Fred showed Su Er how to activate and clear the map, and the brothers explained its secret passages and routes to Hogsmeade.
• Fred and George gave the Marauder’s Map to Su Er, who promised to pass it on to Harry when he no longer needed it.
• Su Er, Fred, and George set off for Hogsmeade through one of the map’s passages.

Su Er bought sweets and joke products with Fred and George in Hogsmeade, then joined them for Butterbeer before they returned to Hogwarts after curfew. The three parted ways in the corridor, leaving Fred and George worried as a tipsy Su Er staggered off alone.

• Su Er bought sweets at Honeydukes, then paid for Fred and George’s joke products at Zonko’s and called the purchase research funding.
• Fred and George told Su Er they planned to buy alcohol at the Hog’s Head and hoped to learn where Hagrid’s Acromantulas were so they could sell venom.
• Su Er agreed to join their Acromantula venture, and Fred and George bought hot Butterbeer for the three of them.
• After curfew, Su Er tried to use the Marauder’s Map without his wand, and George pointed out his mistake.
• Fred used the map to confirm Filch was in his office, then watched as Su Er staggered away with his sweets while Fred and George hoped Merlin would watch over him.

Su Er used the Marauder's Map and found the name Peter Pettigrew in the Gryffindor Common Room, though he could not identify who it belonged to. During the rain-soaked Quidditch match between Hufflepuff and Gryffindor, Hermione said she had never heard of a student named Pettigrew, and Su Er left his explanation for later.

• Su Er woke up hungover, remembered the Marauder's Map, and searched it while alone in the dormitory.
• Su Er found no Peter Pettigrew on the map except for a name in the Gryffindor Common Room, then hid the map when Justin and Morn returned.
• Su Er watched the Hufflepuff-Gryffindor Quidditch match from the Gryffindor stands as Madam Hooch started the game in heavy rain.
• Su Er asked Hermione whether she knew a Gryffindor named Peter Pettigrew, and Hermione said she had never heard of anyone with that surname.
• Su Er told Hermione he would explain where he had heard the name after the match, as Gryffindor celebrated Wood's opening goal.

During the rain-soaked Quidditch match, Dementors invaded the pitch and attacked the players, prompting Su Er, Professor McGonagall, and Dumbledore to drive them back with Patronuses. Harry lost consciousness and fell from his broom, and Dumbledore raised his hand toward him as he dropped.

• Gryffindor scored repeatedly against Hufflepuff, while Cedric searched the sky for the Golden Snitch.
• Lee Jordan announced that Cedric had spotted the Snitch, and Harry also saw it and sped after it.
• Dementors descended on the pitch, spreading despair among the spectators and players.
• Su Er cast a Patronus that drove back the Dementors in the clouds, then used his badger Patronus against one rising toward the stands.
• Professor McGonagall and older students cast Patronuses as Dementors closed in on Harry.
• Dumbledore sent a large bird-shaped Patronus to destroy the Dementor attacking Harry, who then fell unconscious from his broom as Dumbledore raised his hand toward him.

After Harry survived the Dementors’ attack, Cedric caught the Golden Snitch and Hufflepuff won the match. Su Er questioned Percy about Peter Pettigrew, promised Hermione he would teach her the Patronus Charm, and learned that Harry’s Nimbus 2000 had been wrecked by the Whomping Willow.

• Magic slowed Harry’s fall, and Madam Hooch declared Hufflepuff the winner after Cedric caught the Golden Snitch.
• Professor McGonagall carried Harry to the Castle while Su Er asked Percy whether he knew Peter Pettigrew; Percy recalled an old trophy bearing that name.
• Hermione asked Su Er to teach her the Patronus Charm, and he agreed to teach her in a few days.
• Ron showed Su Er a piece of Harry’s Nimbus 2000, which he had found near the Whomping Willow, then said he had spent the previous night in the dormitory with Harry.

After Hufflepuff celebrated its Quidditch victory, Su Er found Sirius Black near the passage beneath the Whomping Willow on the Marauder’s Map and set out to confront him. On his way, Professor Flitwick invited Su Er to share his Patronus experience at a club meeting and mentioned Su Er’s mother.

• Su Er checked the Marauder’s Map and saw that Peter Pettigrew remained in Gryffindor while Sirius Black appeared near the Whomping Willow.
• Su Er recalled the danger Black’s arrival had posed to the students during the Dementor attack and angrily left the Hufflepuff Common Room to find him.
• Cedric congratulated Su Er on Hufflepuff’s victory as Su Er hurried out of the common room.
• Professor Flitwick stopped Su Er near the Whomping Willow and invited him to discuss casting the Patronus Charm at his club’s next session.
• Professor Flitwick said he was going to the Hospital Wing to return Harry’s broom fragments and told Su Er that his mother would have been proud of his talent.

Su Er used Transfiguration to bypass the Whomping Willow and followed the secret passage to the Shrieking Shack, where he prepared to confront Mr. Padfoot. He disguised his face and silenced his voice before reaching for the door behind which he expected the fugitive to be waiting.

• Su Er distracted the Whomping Willow with two transfigured cats, touched its hidden knot, and entered the passage in its trunk.
• Su Er transformed into a badger and followed the passage toward the Shrieking Shack, detecting Professor Lupin's scent and signs that Mr. Padfoot had been there.
• Su Er entered the Shack and found the empty room where Professor Lupin had transformed, then realized Mr. Padfoot was likely behind a closed door.
• Su Er changed back into human form, concealed his face, and used a spell to silence his voice.
• Su Er gripped his wand and reached for the door handle, ready to confront Mr. Padfoot.

Su Er captured Sirius Black in the Shrieking Shack, forcing him out of his Animagus form and identifying himself as a Hufflepuff student. Black asked whether Su Er planned to hand him over to the Aurors for the bounty or fame.

• Su Er anticipated Sirius Black’s attack in dog form and knocked him back with Flipendo.
• Su Er transfigured a box into ropes, bound Black, and used Incarcerous to secure him further.
• When Black kept barking and resisting, Su Er beat him and threatened him with a green spell until he returned to human form.
• Black asked who Su Er was, deduced he was a Hogwarts Hufflepuff student, and asked whether he would hand him over to the Aurors for the bounty or fame.

Su Er confronted Sirius Black in the Shrieking Shack, claiming Dumbledore was arranging to catch Peter Pettigrew and reprimanding Black for endangering Hogwarts students. After beating Black without seriously injuring him, Su Er left him food and told him to stay hidden while the plan unfolded.

• Su Er kept Black restrained, explained that the Marauder's Map had led him to the Shrieking Shack, and claimed Dumbledore had sent him.
• Su Er told Black that Pettigrew had not been caught yet and that Black could not be cleared until he was found.
• Su Er rebuked Black for the Dementors' attack on the Quidditch pitch, which had nearly harmed Harry and other students.
• Su Er used conjured sticks to beat Black, recorded the incident with a crystal ball, and left him bread and water.
• Black thanked Su Er as he turned to leave.

After returning to Hufflepuff’s common room, Su Er removed his face-and-voice disguise and prepared to seek Dumbledore’s support, carrying evidence about Black. He reached the Headmaster’s Office just as Cornelius Fudge and Dawlish were leaving.

• Su Er frightened a young Hufflepuff witch by emerging from the secret passage still disguised, then removed the spells and apologized to her and the gathered students.
• Su Er ate in the common room and gathered Cockroach Clusters, Jelly Slugs, the Marauder's Map, and the Remembrall before going to see Dumbledore.
• Su Er guessed several sweets as the gargoyle’s password before correctly naming Toad Mint Ice Cream and entering the Headmaster’s Office staircase.
• Cornelius Fudge and Dawlish emerged from Dumbledore’s office, and Fudge politely told Su Er that Dumbledore was inside.

Su Er told Dumbledore how he had traced Sirius Black to the Shrieking Shack and learned that Peter Pettigrew had betrayed Harry’s parents. He laid out evidence that Pettigrew was hiding as Ron’s rat, Scabbers, leaving Dumbledore to consider the case against Black anew.

• Su Er showed Dumbledore the Marauder’s Map and explained that Fred and George had given it to him.
• Su Er described how a Remembrall recorded Sirius Black leaving the Room of Requirement and said he had found Black hiding in the Shrieking Shack.
• Su Er explained that Black claimed Peter Pettigrew had betrayed Harry’s parents and faked his death in the street explosion.
• Su Er told Dumbledore that Black escaped Azkaban after seeing Pettigrew in the Weasleys’ Egypt photograph.
• Su Er argued that Ron’s rat, Scabbers, was Pettigrew because Scabbers had lived for ten years and was missing a finger.
• Dumbledore acknowledged the possibility that Pettigrew had used his Animagus form to hide in a wizarding family.

After arranging a plan with Dumbledore to trap Peter Pettigrew, Su Er entered the strange white realm again and tried casting the Patronus Charm. The spell drained his magic until he collapsed, while his glowing body floated above his bed and alarmed Hufflepuff.

• Su Er and Dumbledore planned a Tom and Jerry performance to expose Peter Pettigrew, with Dumbledore arranging the roles and audience for the following weekend.
• Su Er returned to the white realm and suspected that casting the Patronus Charm had brought him there.
• Su Er cast Expecto Patronum without his wand, and silver threads gathered as the spell rapidly drained his magic.
• Su Er lost consciousness and collapsed while the Patronus Charm continued, surrounding him with bright silver light.
• Morn saw Su Er floating and glowing above his bed, woke Justin, and the Hufflepuff prefect went to summon Severus Snape.

Su Er’s magic continued to drain as a silver cocoon formed around him in a mysterious white space. Dumbledore used a red crystal to restore his magic, while the cocoon changed and eventually revealed a long-haired girl who was about to awaken.

• Madam Pomfrey found Su Er healthy but warned that his rapidly disappearing magic could kill him, so Snape brought magic-replenishing potions.
• Lisi watched the stars from the Centaur camp and said that Pluto’s trajectory had changed.
• Dumbledore summoned Amelia Bones and went to Gringotts, then returned with a red crystal while Hermione waited anxiously outside the Hospital Wing.
• Dumbledore shattered the crystal and forced its red magic into Su Er, whose magic drain slowed as the cocoon began drawing in the energy.
• The red cocoon stopped breathing and dissolved, revealing a glowing long-haired girl whose eyelashes trembled as if she were about to wake.

After recovering, Su Er learned that the Philosopher’s Stone had left him with far more magical power than he could control. Dumbledore urged him to relearn spellwork with Filius and Severus as he began adjusting to his new strength.

• Su Er was discharged from the Hospital Wing and thanked Dumbledore for saving his life with the Philosopher’s Stone.
• Su Er told Dumbledore about the white space he had encountered and its possible connection to Dementors and the Patronus Charm.
• Su Er cast a corporeal badger Patronus, which Dumbledore examined and found apparently ordinary.
• Su Er said his magic felt much stronger, and Dumbledore explained that the Philosopher’s Stone and Severus’s potions had given him power he could not yet control.
• Su Er’s Floating Charm launched a cup into the ceiling and crushed it, demonstrating how his uncontrolled magic distorted spells.
• Dumbledore told Su Er to start learning again under Filius and Severus so he could master his power.

Su Er summoned Ariana as an evolved Patronus and agreed to keep her existence from Albus while telling Aberforth. The next day, he took Hermione toward the Whomping Willow to reach the Shrieking Shack on Dumbledore’s instructions.

• Su Er cast Expecto Patronum in the white space and manifested Ariana as a human Patronus.
• Ariana asked Su Er not to tell Albus about her, but said he could tell Aberforth.
• Ariana explored Su Er’s memories and asked him questions about Hogwarts Castle.
• Su Er reassured Harry that he was well and asked Ron how Scabbers was doing.
• Su Er led Hermione toward the Whomping Willow and asked her to use magic to stop it.

Su Er and Hermione entered the Whomping Willow’s secret passage to find Sirius Black, but Su Er’s unusually powerful Flipendo blasted Black unconscious when he attacked them. Black woke after Hermione and Su Er revived him, shocked by the force of the spell.

• Hermione used a conjured mouse to press the Whomping Willow’s knot, and she followed Su Er into the passage.
• Su Er told Hermione they were going to see Sirius Black and led her into the boarded-up room.
• Black lunged at them in the form of a large black dog, and Su Er’s Flipendo hurled him into the wreckage.
• Su Er confirmed Black was breathing, and Hermione revived him with a bucket of ice-cold water.
• Black woke in pain and wondered how Flipendo had become so powerful.

Su Er introduced Sirius Black to Hermione and told him that Dumbledore wanted to see him that night. Back in the Room of Requirement, Su Er began explaining to Hermione how Sirius was connected to Harry’s parents, leaving off as he described the Fidelius Charm.

• Sirius Black recognized Su Er’s build as resembling the wizard who had beaten him, then changed from his Animagus form and introduced himself.
• Su Er told Black that Dumbledore wanted to see him that night and gave him the Headmaster’s password, “Bursting Caterpillar.”
• Su Er handed Black a box of recovered wands before taking Hermione back to the Castle.
• Hermione added ingredients to the Animagus potion and told Su Er it would be ready in a week, when they would need a thunderstorm to complete the transformation.
• Su Er told Hermione not to tell Harry about Sirius that day, then explained the friendship between Harry’s parents, Sirius, Lupin, and Peter Pettigrew.
• Su Er began explaining the Fidelius Charm to Hermione, describing how a Secret Keeper could conceal a secret within their soul.

Su Er revealed to Hermione that Peter Pettigrew had survived the incident blamed on Sirius Black and enlisted Professor Lupin to help expose the truth. As Sirius arrived at Hogwarts, Hermione went to fetch Lupin while Su Er sent Crookshanks to catch Scabbers.

• Su Er told Hermione that Sirius had hunted Peter Pettigrew after Harry's parents died, but Pettigrew had faked his death and been awarded the Order of Merlin posthumously.
• Hermione gave Harry and Ron her parchment for their astronomy work, then watched them with Crookshanks as she prepared to help Su Er's plan.
• Su Er showed Professor Lupin the Marauder's Map and persuaded him to join the search for Peter Pettigrew that night.
• At the Room of Requirement, Su Er and Hermione saw Sirius Black's name appear on the Marauder's Map as he approached Hogwarts.
• Su Er sent Hermione to bring Lupin to Gryffindor Tower and asked Crookshanks to catch Scabbers without alerting anyone.

Su Er, Hermione, and the professors caught Scabbers and brought him to Dumbledore’s office, where Sirius and Lupin confronted the rat as Peter Pettigrew. After Lupin tried to revive him, Su Er noticed Pettigrew was faking unconsciousness.

• Su Er asked McGonagall and Lupin to help retrieve Scabbers from the Gryffindor dormitory while Crookshanks caught him.
• Hermione returned with the sleeping rat, and Lupin confirmed that Pettigrew was an Animagus missing a thumb.
• Su Er and the others brought the rat to Dumbledore’s office, where Lupin reunited with Sirius Black.
• Lupin cast a Reviving Spell on Pettigrew, but Su Er saw his eyes move and realized he was pretending to be unconscious.

Professor McGonagall transformed Scabbers into Peter Pettigrew, who pretended to be a terrified victim and accused Sirius Black of betraying James and Lily to Voldemort. Dumbledore restrained Black and listened as Pettigrew began telling his version of events.

• Professor McGonagall used the spell to restore Pettigrew to human form, but he continued playing dead.
• Pettigrew appealed to Dumbledore, McGonagall, and Lupin for protection while accusing Black of trying to kill him.
• Dumbledore calmed Black and used Legilimency as Pettigrew began explaining their past.
• Pettigrew claimed Black had been the Secret Keeper, betrayed James and Lily to Voldemort, and later killed twelve Muggles before Pettigrew escaped as a rat.

In Dumbledore’s office, Sirius confronted Pettigrew over betraying James and Lily, and Pettigrew confessed that he had revealed their hiding place to Voldemort. Dumbledore stopped Sirius from attacking Pettigrew and kept him unconscious until the Ministry could deal with him.

• Sirius transformed into a dog and attacked Pettigrew, but Dumbledore restrained him with vines.
• Dumbledore questioned Pettigrew about hiding for twelve years, and Pettigrew claimed he had feared Sirius would escape Azkaban.
• Sirius confronted Pettigrew and demanded to know why he had betrayed James and Lily.
• Pettigrew admitted that he had told Voldemort where James and Lily lived, saying he had feared dying if he resisted.
• Sirius fired a spell at Pettigrew, but Dumbledore deflected it and then rendered Pettigrew unconscious until the Aurors arrived.

Su Er carried out the staged raid to bring Minister Fudge to Gryffindor and arrange for Black to be caught with Peter Pettigrew. Black surrendered, but the secret about Pettigrew had not yet been revealed.

• Su Er waited in the Room of Requirement as Black, Hermione, the professors, and the Ministry party took their positions for the planned reveal.
• Su Er interrupted Dumbledore and Fudge in the Headmaster's Office to report that Black had arrived, while Hermione led them toward Gryffindor's Common Room.
• After an explosion, Dumbledore, Fudge, and the others found Black cornered by Professor Lupin and Professor McGonagall, holding a rat.
• Black surrendered to Fudge's party, and Fudge credited Dumbledore and the professors with the capture and promised them Ministry recognition.