The Machine in “Unfinished Business”

[last lines of series] If you can hear this, you're alone. The only thing left of me is the sound of my voice. I don't know if any of us made it. Did we win, did we lose? I don't know. But either way, its over. So let me tell you who we were. Let me tell you who you are. Someone once asked me if I had learned anything from it all, so let me tell you what I learned. I learned everyone dies alone. But if you meant something to someone, if you helped someone, or loved someone, if even a single person remembers you, then maybe you never really die. And maybe...this isn't the end at all.