Based on the middle book in J.K. Rowling's series, "Harry Potter and the Goblet of Fire" was a pivotal film in many ways. Released 10 years ago this week (on November 18, 2005), "Goblet" marked the first time Harry (Daniel Radcliffe) saw one of his friends die, the first time Voldemort (Ralph Fiennes) appeared in the flesh, and the first time we saw the young heroes of Hogwarts as hormonal teenagers.

As often as you've watched "Goblet of Fire," there's a lot you still may not know about it -- from the surprising controversy over the all-star band at the Yule Ball, to the Easter eggs that less-than-sharp-eyed Muggle viewers may have missed. So dip into the Pensieve and learn the secrets of "Goblet of Fire."1. Screenwriter Steve Kloves and the producers initially considered making Rowling's 734-page book into two films. Since they decided instead to condense it into a single 2.5 hour movie, a lot of beloved subplots and characters had to go. Some fans were upset about the snipping of the subplot involving house elves Dobby and Winky. But if you pay close attention during the Death Eaters' attack near the beginning of the movie, you can see two house elves scurry past.

2. The streamlining also meant that "Goblet" was the first Potter picture that didn't open with Harry spending a miserable summer with his Muggle relatives, the Dursleys. Richard Griffiths and Fiona Shaw were miffed at having Uncle Vernon and Aunt Petunia cut from the story. Griffiths went to J.K. Rowling herself to plead for his inclusion -- maybe Uncle Vernon could visit Harry at Parent's Day at Hogwarts? Her polite response: "I don't think so."

3. The most arduous part of the shoot for Radcliffe was the underwater sequence. He spent six months training for the second Triwizard Tournament task and spent more than 40 hours shooting in a 500,000-gallon tank constructed for the film. For his trouble, he suffered two ear infections, but he said he felt the result on screen was worth it.

4. The supergroup performing at the Yule Ball -- which included Jarvis Cocker of Pulp and Jonny Greenwood and Phil Selway of Radiohead, should have been a much bigger deal. Initially called the Weird Sisters (after the witches in "Macbeth"), the band ran into a name conflict with a real-life Canadian band called Wyrd Sisters. The filmmakers asked the folk act for permission to use the variant of their name and offered them $5,000 but were turned down. As a result, the Yule Ball group goes unnamed in the movie, though in a deleted scene, the musicians are described as "the band that needs no introduction."

5. Harry and Ron's dates to the ball are the Patil twins, Parvati and Padma. The book describes them as identical twins, but the actresses who play them -- Shefali Chowdhury as Parvati and Afshan Azad as Padma -- are not related.6. It took almost three hours in the make-up chair to transform Ralph Fiennes (pictured) into Voldemort. His eyebrows were hidden with gelatin, fake teeth were added, and computer tracking dots were pasted onto his nose so that it could be digitally removed in post-production. Still, he only needed two days on the set to complete Voldemort's few scenes in "Goblet of Fire."

7. Bulgarian Quidditch star Viktor Krum (played by Bulgarian actor Stanislav Ianevski) looms large in the "Goblet" plot, but for all his screen time, he has only two lines of dialogue, amounting to just 20 words.

8. In keeping with the film's darker-than-usual tone, "Goblet" was the first of the "Potter" movies to earn a PG-13 rating.

9. About 37 minutes into the film, Dumbledore (Michael Gambon) can be seen wielding the rune-marked Elder Wand, a prop that will be a key plot point in the final film, "Harry Potter and the Deathly Hallows, Part 2."

10. A line in the end credit scroll reads, "No dragons were harmed in the making of this movie." In case you were worried.