Dr.A, I hope to see your interview and possible Z series. It looks like the History Channel is getting back on track which is sorely needed. All the alien programs have really damaged their credibility over the past decade or so. If this were 5 years ago, they would probably be posing the theory that Z and others like Jack the Ripper were not identified because they were aliens or used alien technology to elude authorities. Anyway, I look forward to your interview and the program. Please keep us updated. Spoiler alert: Z was bigfoot, or an alien, or part of a vast conspiracy that went all the way to the top!