I've been reviewing all of the Harry Potter series, with just two films remaining (not counting the yet-to-be-released Deathly Hallows, Part II). So far, Chamber of Secrets, Prisoner of Azkaban and Order of the Phoenix passed both the Original and Reverse Bechdel tests. Sorcerer's Stone passed OB-2, while Goblet of Fire only passed OB-1. All five films passed the Reverse Bechdel. Harry Potter and the Half-Blood Prince was released in 2009. It made $933 million worldwide, a $5 million drop from the previous movie, Order of the Phoenix.
The first woman with lines in the movie is the waitress at the train station. The first man is Harry Potter.
The second man in the movie is Dumbledore. He meets Harry at the train station, and tells him that he's been reckless this summer. Harry says he likes riding the trains because it takes his mind off things. Dumbledore says to take his arm, then teleports him away from the station, after which they both have a couple lines about the teleportation, then a couple more in front of Horace's house. Half-Blood Prince easily passes all three levels of the Reverse Bechdel by the 5-minute mark. Dumbledore also speaks with Horace about Harry and the Death Eaters. Horace and Harry also talk to each other, although mostly about Harry's mother.
The second woman in the movie is Ginny Weasley. She sees Harry's owl and his other stuff in their house. She calls out to her mom, who is the third woman in the movie. Mrs. Weasley says, "Ginny, what is it?" Ginny replies, "I was only wondering when Harry got here." Mrs. Weasley says, "Harry who?" Ginny tells her it's Harry Potter; Mrs. Weasley insists he's not there, but Ginny says that all of his stuff is. Mrs. Weasley, "seriously doubts that." Ron trades some lines with Ginny, then Hermione shows up, and asks if that was an owl she heard. Ginny asks her if she's seen Harry, who she thinks is wandering about the house. Hermione only replies, "Really?" Both conversations-- between Ginny and Mrs. Weasley and between Ginny and Hermione, satisfy OB-2. However, both conversations are also about Harry, so neither one satisfies OB-3.
On the train to Hogwarts, Luna offers a Quibbler to Ginny, who accepts, and asks what it's about. Luna says it's about invisible creatures who fly into your ears and make your brain fuzzy. Unlike the other Harry Potter movies, Half-Blood Prince easily passes the Original Bechdel early in the film (with two hours left in the movie).