(This post has spoilers. Not for the ending of BioShock Infinite, but for things that happen near the end. Proceed with high caution.) The first time you meet him is before you even see him. It’s the shrill call that grabs your attention, a striking pitch that you know can only mean imminent danger.
"I'm sorry. I never should have left. I never should have left. Take me back. Take me back. Take me home... please."