[last lines]
Tyrell Wellick: How long has this been going on?
Elliot Alderson: I don't know.
Tyrell Wellick: And what is it that you're doing exactly?
Elliot Alderson: Encrypting all the files, all the Evil Corp's financial records will be impossible to access. The encryption key will self-delete after the process completes.
Tyrell Wellick: What about the backups?
Elliot Alderson: I took care of that too. China...
Tyrell Wellick: Steel Mountain? Of course, even when we went redundant.
Elliot Alderson: I hacked the AirDream network. I was in all of them.
Tyrell Wellick: You really thought of everything.
[pauses]
Tyrell Wellick: Who else was involved?
Elliot Alderson: Just me.
Tyrell Wellick: Well, now it's you and me. I've always told we'd end up working together, Elliot. But still, I have to know. Why did you do it? What did you hope to accomplish by doing all of this?
Elliot Alderson: I don't know.
[pauses]
Elliot Alderson: I wanted to save the world.