Chapter Summaries

Douglas taught his students about Inferi and assigned an essay, then announced that the next lesson would be practical and would determine the sixth-year class representative. Meg Erin recited her Grindylow notes to him while Hermione’s attempt to supervise Gryffindor memorization collapsed amid complaints from her classmates.

• Douglas assigned a ten-inch essay on Inferi and announced a practical lesson whose top performer would become sixth-year class representative.
• Douglas reviewed plans for a Defense Against Dark Magic training ground and received Meg Erin, who recited the key points about Grindylows.
• Douglas explained his tea-making ritual to Erin and said the tea could help wizards think calmly and ease the effects of Dark Magic.
• Hermione tried to make Gryffindor students memorize their notes, but Harry, Ron, Neville, Lavender, and others resisted.
• Seamus Finnigan challenged Hermione’s appeal to Gryffindor honor by asking why they had not been sorted into Ravenclaw if they were better at memorization.

Hermione used Percy’s advice to motivate the students to memorize their Defense Against Dark Magic textbooks, while Douglas discussed his teaching philosophy with Professor McGonagall. The chapter ended with Douglas deciding to use students’ free time to strengthen their theoretical knowledge.

• Hermione urged the students to memorize their textbooks so they could learn combat techniques before Slytherin, and Ron, Harry, George, and Fred joined the lively study session.
• Hermione explained that Percy had advised her on how to win the students’ cooperation as a class representative.
• Douglas took his proposal to Professor McGonagall, who praised the effect his lesson had had on students’ studying.
• Douglas argued that students needed to memorize knowledge from textbooks before applying it in practice, while Professor McGonagall warned that rigid knowledge could hinder magical creativity.
• Douglas reflected on the gaps in students’ theoretical understanding and decided to use their free time to address them.

Douglas discussed practical lessons and student safety with Professor McGonagall, then assigned his six class representatives supervised study tasks. He checked Hermione's homework while Xiu stayed behind to memorize his text.

• Douglas gave Professor McGonagall documents proposing practical instruction, and she raised concerns about student safety.
• Douglas met with six class representatives and tasked Shirley and the Weasley twins with marking and explaining their classmates' tests.
• Hermione told Douglas that three Gryffindors had memorized the text and presented her completed homework.
• Douglas asked Hermione to hear Webb and Xiu recite their texts, then allowed Xiu to study in the office until he had memorized his.
• Douglas read Hermione's essay and found that she had cited Ministry of Magic regulations.

Douglas began his first Hogwarts patrol with Filch, while Gryffindor and Slytherin students competed to study for his tests. That night, George Weasley and Fred Weasley used the Marauder's Map to check the castle and locate its occupants.

• Students across Hogwarts crammed for Douglas's tests, while Ravenclaw students helped correct Gryffindor and Slytherin recitations and Hufflepuffs struggled to study while watching.
• Douglas met Filch in his office, gave Mrs. Norris catnip paste, and joined Filch on a two-hour tour of the castle's patrol route and secret passages.
• Douglas reflected that he had taken the Marauder's Map from Filch's office in his second year, returned it at graduation, and later learned how to hide himself from it.
• George Weasley and Fred Weasley slipped out at night, went to a secluded corner on the Seventh Floor, and revealed the Marauder's Map.
• George Weasley activated the map, and he and Fred Weasley checked the locations of Dumbledore, Mrs. Norris, Filch, and Peeves.

Douglas overheard Fred and George plotting to sneak into classrooms prepared for the seventh-years, then caught them when their escape tricks backfired. Filch arrived to find the twins covered in Dungbomb filth, and they gave up after their first major defeat since second year.

• Douglas hid in the corridor and overheard Fred and George use the Marauder's Map to plan a search of the seventh-year classrooms for exam clues.
• Douglas confronted the twins, but they threw two small balls and fled in opposite directions.
• Douglas repaired the balls with a Mending Charm, enchanted them, and sent them after the fleeing twins.
• The enchanted balls exploded near a secret passage, covering Fred and George in yellow-brown Dungbomb smoke and alerting Filch.
• Filch and Mrs. Norris reached the twins, while Douglas protected himself and Mrs. Norris with Bubble-Head Charms; the twins surrendered to their defeat.

Douglas stopped Filch from punishing George Weasley and Fred Weasley himself, then disciplined them for wandering at night and attacking a professor. At his office, he confiscated the Marauder's Map and revealed that he had used it before and returned it after graduating.

• Douglas overruled Filch and deducted fifty points from Gryffindor for each twin, assigning both two months of detention.
• Douglas used Scourgify to clean the corridor, then took the twins to his office while Filch resumed his patrol with Mrs. Norris.
• George and Fred joked about Filch and Douglas, so Douglas added another two weeks of detention.
• Douglas demanded the Marauder's Map, and George handed it over.
• The twins asked whether Douglas was one of the map's creators, and he said he had used the map before and returned it to its hiding place when he graduated.

Douglas punished George and Fred for their failed attempt to spy on the practical assessment, confiscating the Marauder’s Map and assigning them textbook write-ups. He used the Map to find Peter Pettigrew beside Ron Weasley, then inspected the students’ practical classrooms and prepared to test the fourth years.

• Douglas ordered George and Fred to write out their fourth-year Defense Against Dark Magic textbooks from memory during detention, with time off for Quidditch practice, and kept the Marauder’s Map until they behaved.
• Douglas opened the Marauder’s Map and found Peter Pettigrew’s name overlapping Ron Weasley’s in the Gryffindor dormitory.
• Douglas inspected the practical classrooms prepared by Mario Nott, Ruth Bunier, Ezekiel Clark, and other students, and asked Bunier and Clark to write an experimental report.
• Douglas taught the seventh years in the practical training area and was pleased with their work and the system’s assessment of the lesson.
• George and Fred led their fourth-year classmates to the practical classroom, while their classmates sympathized with them and Wood promised to seek extra Quidditch practice.

The Weasley Twins faced public ridicule after their Dungbomb mishap, then sparked a fight by hexing Marcus Flint. Professor McGonagall punished them with lost points and more textbook writing, while Snape added their Potions textbook to the assignment.

• Hermione complained that the Weasley Twins had emptied Gryffindor's hourglass, and Harry and Ron discussed their punishment.
• Marcus Flint mocked George and Fred for getting hit by Dungbombs, prompting them to hex him with Langlock and Itch all over.
• The Gryffindor and Slytherin students drew their wands, but Professor McGonagall stopped the brewing fight.
• Professor McGonagall took fifty points from Gryffindor and ordered George and Fred to write out their Transfiguration textbook from memory alongside their Defense Against Dark Magic textbook.
• Snape cured Flint, then added the Potions textbook to the twins' punishment before leaving.

Douglas gave his Defense Against Dark Magic class a practical exam using dangerous creatures, beginning with George Weasley in an enchanted classroom. George survived a Grindylow’s attack but was rescued by Douglas, who then led him back outside.

• George handed Douglas Professor McGonagall’s note, and Douglas lined the students up in the corridor for their practical exam.
• Douglas explained that the students had to use what they had learned about dark creatures, then sent George in first after threatening the Weasley brothers with extra detention.
• George entered a classroom that contained a pond and paddled across it, realizing that an enchantment made the water harder to move through when he struggled.
• A Grindylow grabbed George and dragged him underwater, where his frantic movements trapped him in the enchanted pond.
• George accidentally struck the Grindylow’s head and escaped its grip, but Douglas used a rope to haul him out, dried his clothes, and gave him a potion.
• Douglas led the coughing George through the classroom door, returning them to the corridor.

Douglas explained the lessons behind his practical Defense Against Dark Magic exam and arranged weekend access for students to try it under supervision. As Gryffindors and Slytherins confronted each other after class, Douglas drew his wand, startling both groups and easing the tension.

• After George left the exam early, Douglas invited him to describe his attempt, and George told the students about the Portable Swamp and Grindylows.
• Angelina Johnson asked what the stages were meant to test, and Douglas explained that students needed to stay calm in unfamiliar danger.
• By the end of class, the Weasley twins had reached the third stage, while Angelina and Lee Jordan were defeated in the second and the other students failed the first.
• Douglas announced that two seventh-year students would supervise weekend assessments and assigned everyone a two-foot paper due in a week.
• When Slytherins approached the Gryffindors, Douglas drew his wand, and the startled students on both sides relaxed.

Douglas’s fourth-year practical lessons put Gryffindor and Slytherin students through encounters with dark creatures, while news of the classes stirred excitement and anxiety throughout Hogwarts. He continued teaching by making his second-year Gryffindors memorize their text, then reflected bitterly on Snape after learning he could not take Advanced Potions.

• Fred, George, and Cassius Warrington exchanged forced greetings, but Professor Holmes’s presence kept Gryffindor and Slytherin from fighting.
• Warrington used a Bubble-Head Charm to pass the Grindylow stage, but the charm burst while he faced a troll, and he vomited after breathing in its foul stench.
• The Grindylow grew so overworked during the practical lessons that a seventh-year student brought in a reserve creature to replace it.
• News of the lessons spread through Hogwarts, prompting younger students to hope for practical challenges and sixth-years to rush to the library to study Inferi.
• Douglas rewarded Gryffindor twenty points after Hermione reported that the class had memorized the previous lesson, then assigned the students more reading and memorization.
• Douglas muffled the sound of the class with his own charm and resented Snape for not allowing him to choose Advanced Potions.

Douglas graded the second-years’ Boggart homework and teased Neville about his proposed method of getting one drunk. In the sixth-year practical lesson, Oliver Wood broke a magically protected lock with an axe, and Douglas reminded the students that defenses could be defeated physically as well as magically.

• Douglas gave the second-years’ homework marks and ordered everyone who received a P to redo the assignment before the next lesson.
• Douglas questioned Neville about his suggestion to get a Boggart drunk and promised to let him test it in a future practical lesson.
• Douglas began the sixth-year practical lesson by telling the students that the highest scorer would become class representative.
• Roda Dolohov and Andrei failed to open the locked door with unlocking spells.
• Oliver Wood transformed a book into an axe and broke the lock, earning ten points for Gryffindor.
• Douglas praised Wood and explained that physical attacks could overcome traps designed to resist magic.

Douglas put his Defense Against Dark Magic students through a simulated Inferi challenge, but they all relied on fire instead of light, and Dolohov lost control of a Fiendfyre Curse. After Douglas punished Dolohov and deducted fifty points from Slytherin, Snape approved of the deduction, leaving Douglas unsure whether Snape would defend his student.

• Wood entered the dark classroom first, discovered the Inferi beneath a lake, and failed to stop them with the Fire-Making Spell.
• Douglas explained that the Inferi were Fake Inferi and that a powerful Lumos would have kept them submerged, but none of the students thought to use light.
• Dolohov cast an out-of-control Fiendfyre Curse, and Douglas extinguished it with Finite Incantatem before it could spread.
• Douglas deducted fifty points from Slytherin and ordered Dolohov to write an account of his misconduct and copy the Hogwarts school rules two hundred times.
• Snape confronted Douglas in the corridor and said that deducting fifty points had been quite right, making Douglas wonder whether Snape would stand up for Dolohov.

Douglas helped Snape deal with Dolohov, then discussed improving Potions Classroom safety and teaching with Snape. Snape dismissed Douglas despite considering his suggestions, and Douglas left thinking about gaining seniority at Hogwarts.

• Snape sent Dolohov away after rebuking him for losing Slytherin fifty points.
• Snape took Douglas to the spotless Potions Classroom to show him its Muggle-inspired equipment and defend the wizarding world.
• Douglas suggested creating safety regulations and using advanced Potions students as rotating classroom assistants.
• Snape acknowledged Douglas's ideas but told him to leave because he had not studied Advanced Potion-Making.
• Douglas left resentful and imagined how he would address the Hogwarts professors once he had gained seniority.

Douglas reviewed his teaching points and resolved to add more study sessions, then caught the Weasley Twins using Auto-Answer Quills to fake memorizing their textbook. He made them study late into the night and tested their recitation with enchanted quills.

• Douglas checked his weekly system points and decided to add morning reading, exercises, and evening study sessions for Hogwarts students.
• George and Fred told Douglas they had memorized their textbook, but secretly used Auto-Answer Quills to copy it out.
• Douglas recognized the quills by their handwriting and threatened to confiscate them and inform their mother unless the twins memorized the material.
• At two in the morning, George and Fred finished memorizing, and Douglas enchanted their quills to record their recitation and mark mistakes.

Douglas hosted George and Fred overnight after making them recite their study notes, then invited himself to Hagrid’s afternoon meal of pork stew with glass noodles. The Weasley twins returned to their dormitory exhausted, only for Oliver Wood to wake them for Quidditch practice.

• Douglas checked George and Fred’s dictation, made beds for them in his office, and told them to stay there overnight.
• The next morning, George and Fred asked to borrow Douglas’s books, but he refused unless they earned an O in Defense Against Dark Magic.
• Douglas remembered he had meant to watch the Marauder’s Map for signs that Lucius Malfoy had brought the diary into Hogwarts.
• Hagrid invited Douglas to eat pork stew with glass noodles that afternoon after Douglas finished his morning exercise.
• Oliver Wood woke George and Fred before dawn for Quidditch practice, but they complained about losing sleep and Lee Jordan teased them.

Douglas visited Hagrid’s hut, where he stopped Ron’s Slug-Vomiting Charm and shared pickled chicken feet that he jokingly called phoenix feet. He stayed to eat with Hagrid, Harry, Ron, and Hermione, and the conversation ended with Hagrid defending his care of Fang.

• Douglas told the waiting fifth-years to review their earlier lessons for the practical classroom assessment, then headed to Hagrid’s hut at noon.
• Douglas found Ron hiccupping and vomiting slugs after a spell had backfired from his broken wand, and he stopped the effect with a nonverbal Finite Charm.
• Douglas placed a jar of boneless pickled chicken feet on the table, prompting Hermione to wonder how he could have obtained so many phoenixes.
• Hagrid explained that the so-called phoenix feet were chicken feet, and the group ate them while guessing Douglas’s grandiose names for his dishes.
• Douglas teased Hagrid about Fang seeming weaker, and Hagrid replied that Douglas had simply grown stronger since he was a child.

Hagrid’s meal with Douglas, Ron, Harry, and Hermione turned to the house feud over Douglas’s lion’s head dish and Ron’s failed Slug-Vomiting Charm. After Hagrid recalled Douglas and Bill fighting Slytherins who had insulted Douglas, the chapter left Douglas remembering that he had not intended to let the boys off easily.

• Hagrid explained that the dish called “lion’s head” had been renamed “big meatball” after Gryffindor and Slytherin students fought over it, and Douglas recalled being punished for introducing the dish.
• Douglas asked Ron who he had tried to hit with the Slug-Vomiting Charm, and Hermione said Ron had gone after Malfoy for calling her a “Mudblood.”
• Ron explained that “Mudblood” was a slur against Muggle-born people and urged Douglas to punish the Slytherins who used it.
• Hagrid recalled that Douglas and Bill had once sent Slytherins back to the Hospital Wing after they insulted Douglas, who was Muggle-born.
• Douglas remembered that the professors had punished both sides equally, but he had not intended to let the offending boys off.

Douglas's questions about the word Mudblood upset Snape, who silenced him and left. Later, Douglas tried to repair Ron's broken wand at Hagrid's Hut, but it exploded, leaving him blaming Ollivander.

• Douglas repeatedly asked what Mudblood meant, prompting Snape to erupt and leave after commanding him not to say the word again.
• Douglas later heard that Slytherins recovering in the Hospital Wing had been sent to St Mungo's after drinking their badly brewed potions.
• At Hagrid's Hut, Douglas asked Ron to show him Charlie's broken wand and tried to mend it with the Mending Charm.
• The repaired wand exploded, but Douglas shielded himself and the children while Hagrid protected the jar of pickled pepper chicken feet.
• Douglas examined the ruined wand and muttered, "Ollivander, that old fraud!"

Douglas accidentally destroyed Ron’s wand and persuaded him to accept a replacement as a gift. At Hagrid’s meal, an old Hogwarts rule about using wands as chopsticks prompted Douglas to reveal a mishap from his school days, leaving Harry convinced Douglas had once carried two wands.

• Douglas broke Ron’s wand during an experiment and promised to buy him a replacement.
• Harry and Hermione helped Douglas persuade Ron to accept the new wand as a gift and keep it secret from George and Fred.
• Hagrid gave Douglas unicorn-horn chopsticks he had made, recalling that two unicorns killed by Voldemort had provided the material.
• Hagrid connected the chopsticks to Hogwarts rules against using wands as chopsticks and cauldrons for hot pot.
• Douglas explained that a hot-pot spell had once sent several students to the Hospital Wing, and Harry suspected Douglas had been one of them.