Articles referencing to this book: Anna Anderson, a.k.a. Anna Tchaikovski... a.k.a. Anastasia? The Missing Romanovs

NOVA was first released to public broadcasting stations in the United States in 1974, and has brought the world of science to laypeople ever since. The premise of the series is that scientific knowledge does not need to be treated as obscure secrets for the trained few; that, if explained in a straightforward way, scientific findings and theories can be understood by anyone with a curious heart.
NOVA has profiled many mysteries in the past, and gives a good idea of what scientists both think and do about these mysteries. And, since science seems to ever be at arms with claims made by believers of paranormal and supernatural events, it should be no surprise that many episodes of this series also show how scientists have examined many of these claims. It's an excellent, informative, and entertaining series that I recommend as viewing to anyone; and, as of 2002, new episodes are still produced on a regular basis to be shown on public television in the States and abroad.
Of course, it's hard to predict when a particular episode you want to see will be shown again; so you may want to do what I occasionally do... go to the WGBH Television webpage, and just buy a copy of the episode you want. Near as I can tell, all of them are available.