Mulder: Well, I don't want to jump to any rash conclusions, but I'd say he's definitely our prime suspect.
Scully: But Mulder, the man we're talking about is 77 years old.
Mulder: George Foreman won the heavyweight crown at 45. Some people are late bloomers.
Mulder: Anyway, this still doesn't explain BJ's connection to all this.
Scully: What if it's cryptamnesia?
Mulder: You mean consciously forgotten information?