Harry has nightmares about his parents disappearing in a flash of green light, while a high voice cackles with laughter. Harry finds out that Snape will be referee for his next Quidditch match. He tells Ron and Hermione, who tell him he should not play. At that moment Neville topples into the common room, his legs stuck together by a Leg-Locker Curse, put on him by Draco Malfoy. Comforting him, Neville gives Harry back a Famous Witches and Wizard card from one of the chocolate frogs they gave him to comfort him, and suddenly Harry reads and remembers he saw Flamel's name on this card before.
Hermione gets a book from her room and they read about Flamel. He is the only known maker of the Sorcerer's Stone which can transform any metal into pure gold and also produces the Elixer of Life, which will make the drinker immortal. Flamel's wife's name is Perenelle. They suspect that the three-headed dog must be guarding Flamel's Sorcerer's Stone. Harry, Ron and Herminone practice the Leg-Locker Curse ¤ Locomotor Mortis in case they need to use it on Professor Snape. During a Quidditch match Ron and Neville have a fight with Malfoy, Crabbe and Goyle. After the match he follows Snape sneaking into the forbidden forest and listens to him talking to Quirrell.
- Daniel Radcliffe - Harry Potter
- Rupert Grint - Ron Weasley
- Emma Watson - Hermione Granger
- Sean Biggerstaff - Oliver Wood
- James Phelps - Fred Weasley
- Oliver Phelps - George Weasley
- Matthew Lewis - Neville Longbottom
- Ian Hart - Quirinus Quirrell
- Alan Rickman - Severus Snape
- Richard Harris - Albus Dumbledore
- Tom Felton - Draco Malfoy
- Jamie Waylett - Vincent Crabbe
- Joshua Herdman - Gregory Goyle
- Shefali Chowdhury - Parvati Patil