William the Conquerer successfully invaded England(the only one), and built the Tower of London in 1099. For a thousand years, the mighty white towers guarded the land. Here PBS opens the secret doors; and reveals to the public(for the first time) the prison chamber where Sir Thomas More was held for a year, before he was murdered. Thomas More rebuked King Henry the VIII(and his new religion), and paid a mighty price. Here also is the courtyard chopping-block, where Henry the VIII sent his former wives who....eh....let him down.....PBS films the Royal Palace, the royal mint, the site of the royal menagerie, and more. Sir Walter Raleigh was an English explorer and writer who was imprisoned in the Tower of London in 1603. Some years ago, I toured Tower grounds and was shown Sir Raleigh's lofty prison home. But here it is not photographed by PBS. Also, there are no shots of the Armory's massive musket and pistol collection(A sight to see). PBS's "Secrets of the Tower of London" is a professional, sometimes grim documentary. I was disappointed not to see the Royal Crown Jewels, valued at 46 billion dollars(They may be priceless). The Royal Crown Jewels are not filmed. Naturally. It is illegal.