William. Please, Xavier, don't get up. I call it the neural inhibitor. It keeps you outta...

Professor X: William. William Stryker: Please, Xavier, don't get up. [electronic static] William Stryker: I call it the neural inhibitor. It keeps you outta here. Professor X: What have you done with Scott? William Stryker: Don't worry. I'm just giving him a little reeducation. Of course, you know all about that, don't you? Professor X: William, you wanted me to cure your son. But mutation is not a disease. William Stryker: You're lying. You were more frightened of him than I was. You know, just one year after Jason returned from your school... my wife - you see he resented us. He blamed us for his condition. So he would toy with our minds... projecting visions and scenarios into our brains. Well, my wife, in the end... she took a power drill to her left temple in an attempt to bore the images out. My boy, the great illusionist. [crackling] Professor X: For someone who hates mutants... you certainly keep some strange company. William Stryker: Oh, they serve their purpose... as long as they can be controlled. Professor X: You arranged the attack on the president. William Stryker: You didn't even have to read my mind. You know, I've been working with mutants as long as you have, Xavier... but the most frustrating thing I've learned is that nobody really knows how many even exist or how to find them - except you. Unfortunately this little potion won't work on you, will it? You're much too powerful for that. Instead we'll go right to the source. Allow me to introduce mutant 143. The fluid secreted by his brain acts as a mind-controlling agent. [machinery hissing] William Stryker: But that's only where it begins. Professor X: Jason. Oh, my God, William. This is your son. What have you done to him? William Stryker: No, Charles! My son is dead... just like the rest of you. [hissing continues, Xavier gasps]