"Listen closely, April. I don't remember a time before living in that laboratory. That fateful night started like any other: Sachs gave us our injections, your father made sure our vital signs were strong, and you as always provided us with a special treat. After the brothers went to sleep, I heard loud voices... it was the smell of smoke. Alarms sounded. Your father had discovered the truth behind the man he was working for. He set fire to the lab; his last breath was taken trying to destroy Shredder's plan. I was terrified. But then you appeared, and ushered us to safety. I never had a voice, then. But I thank you now, April."