What is the third movie in the Harry Potter series?

Harry Potter and the Half-Blood Prince is about how Harry finds out all about Voldermort's past to help him defeat Voldermort. Harry finds a potions book that used to be the Half-Blood Princes. He used some helpful spells and some that got him into trouble. Professor Dumbledore kept going out to find the Horcruxes (we learn that later on in the film) then, he thought that he had found one and he asked Harry if he would like to come along. Harry said yes and they went to a cave. The Horcrux they found was a fake, and to have taken the fake Horcrux Dumbledore had to drink a potion that made him go half mad! When they got to Hogwarts castle, Dumbledore sent Harry downstairs so he wouldn't be seen because the Death Eaters were there and Draco Malfoy was supposed to kill Dumbledore but Professor Snape did it in the end. Then, all the Death Eaters escaped and Harry chased after Snape. He used the spell 'Sectumsempra' on Snape and Snape told Harry that he, in fact, was the Half-Blood Prince.

Sorry, if this wasn't the whole of the Harry Potter story, I didn't have much time to write this and if you want more details, then just contact me on my message board! I AM A HUGE FAN OF HARRY POTTER!!! :D Believe me, I know lots of facts about it!!! :P