There's some amazing, never-before-seen footage from an obviously "official" making-of documentary on Star Trek—The Motion Picture that just popped upon YouTube—as Part I and Part 2.
David Fein, producer for Robert Wise on the DVD Director's Edition, just alerted me to it. Persis' infamous and emotional haircut to be Deltan-bald is worth the price alone... Fascinating!
The mystery is, how did no one know of this for so long, and how did it turn up now?