Gotta love the BBC! Check out the David Attenborough BBC Archive page which now includes all six episodes of his Zoo Quest for a Dragon TV series, first broadcast in 1956! Unfortunately its only available to UK users, due to copyright restrictions.

Program 1 synopsis...

David Attenborough and cameraman Charles Lagus begin their quest in Borneo, the first in the chain of islands they must cross in order to reach Komodo. There they trek through jungle to a village belonging to the Dayak tribe, where they are given a warm welcome. The 'Zoo Quest' team are hoping to find an orangutan and, with guidance from the Dayaks, they discover and film one in the wild. However, it is an orphaned orangutan held captive by a hunter that Attenborough falls for in the end.
Amazon.co.uk has a number of Zoo Quest products available, and I thoroughly enjoyed 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