Lost gems of radio and television, some of which have never been repeated, include an interview with Martin Luther King filmed shortly before he was assassinated, and a 1956 episode of the nature series Zoo Quest in which a young David Attenborough captures the komodo dragon on film for the first time.Attenborough's "Zoo Quest For A Dragon" is a programme and book we've mentioned before on this site, and Whirligig TV have a page all about it here - Zoo Quest For A Dragon.
The episode has never been repeated but could soon be available online as part of the ambitious project, led by the BBC's director of future media and technology, Ashley Highfield.
The page has includes a video clip from the film which you can download here (364k - Real format).
Amazon.co.uk has Zoo Quest products available, and I STRONGLY recommend reading the book, or even better (because David Attenborough reads it), get the book on CD. It's a great adventure. Zoo Quest books and tapes are also available in the US: Zoo Quest stuff at Amazon.com