Harry Potter is back in the sixth installment of the boy wizard based on the J.K Rowling's books.  In this film clip (I Know What You Did Malfoy?) from HARRY POTTER AND THE HALF-BLOOD PRINCE, Harry fights Malfoy who has gone to the dark side.                             

 Movie Synopsis: 

Voldemort is tightening his grip on both the Muggle and wizarding worlds and Hogwarts is no longer the safe haven it once was. Harry suspects that dangers may even lie within the castle, but Dumbledore is more intent upon preparing him for the final battle that he knows is fast approaching.

Together they work to find the key to unlock Voldemort's defenses and, to this end, Dumbledore recruits his old friend and colleague, the well-connected and unsuspecting bon vivant Professor Horace Slughorn, whom he believes holds crucial information. Meanwhile, the students are under attack from a very different adversary as teenage hormones rage across the ramparts. Harry finds himself more and more drawn to Ginny, but so is Dean Thomas. And Lavender Brown has decided that Ron is the one for her, only she hadn't counted on Romilda Vane's chocolates! And then there's Hermione, simmering with jealousy but determined not to show her feelings. As romance blossoms, one student remains aloof. He is determined to make his mark, albeit a dark one. Love is in the air, but tragedy lies ahead and Hogwarts may never be the same again.

This film has been rated PG for scary images, some violence, language and mild sensuality.

Cast: Daniel Radcliffe, Rupert Grint, Emma Watson, Jim Broadbent, Helena Bonham Carter, Robbie Coltrane, Warwick Davis, Michael Gambon, Alan Rickman, Maggie Smith, Timothy Spall, David Thewlis, Julie Walters, David Bradley, Jessie Cave, Frank Dillane, Tom Felton, Matthew Lewis, Evanna Lynch, Helen McCrory, Natalia Tena, Hero Fiennes Tiffin, Bonnie Wright

Director: David Yates Writers: Screenplay by Steve Kloves
Based on the novel by J.K. Rowling
Producers: David Heyman, David Barron
Executive Producer: Lionel Wigram

Genre: Fantasy Adventure

Warner Bros. Pictures