Just thought i'd put this out there - my son saw that he was supposed to watch The Man in the Iron Mask - i hadn't bought it, and didn't have it, but i thought i might find it online, and i did!
It was the original 1929 version, with Douglas Fairbanks - silent movie with the narrator - my son is 15 and watched the whole thing
www.moviesfoundonline.com - it had a bunch of other older movies (that are now in the public domain) - so might be useful to someone later on, as well
hope this helps someone!
Thank you for this information! I'm saving the link to my favorites.