The entire ending dialogue in "Uncanny Valley", culminating in one of many Crowning Moments of Awesome for Reid:
Samantha: "Don't leave me."
Victim: (just recovering from paralysis) "Let us go."
Samantha: "I can't."
Reid: (walking into the room) "Samantha? Hi. My name's Spencer. I'm with the FBI. Listen, I know what your father did to you, and I want you to know that he can never ever hurt you again."
Samantha: (mechanically) "He never touched me, he's a good father, he loves me."
Reid: "I know that he probably forced you to say those things. Punished you if you got it wrong, send you to the 'room with the lightning'?"
Reid: "The dolls that your father gave you, after he hurt you, what would happen to them?"
Samantha: "He... he kept them in his office with the other toys."
Reid: "And that's where he let you play with them?"
Samantha: "When I moved out, I had to take my friends with me, I couldn't... leave them behind."
Reid: "Of course. So you went to get them. What did... what did you find?"
*Flashback of adult Samantha walking into her father's office, seeing him stroking the hair of a little girl holding her dolls*
Samantha: "He couldn't. He said they were gone for good."
Reid: "He lied. He's been lying to you for a very long time. Do you want to see them?"
Samantha: "... Can I?"
Reid: "Yeah! Yeah, do you want to play with them?"
* Reid wheels out a child's suitcase and opens it, showing Samantha's dolls. She walks over with such a smile of childish delight as to inspire Manly Tears. She picks one up and starts to cry while cops and paramedics stream in.*
Reid: "Listen, Samantha? You need to go with these men. But your friends can go with you, okay?"
Samantha: "N-No one'll take them away?"
Reid: "I promise, no one will ever take them away again."