BBC Programme Catalogue

This is a pretty remarkable collection. It details 946,614 BBC Radio and TV programmes, dating back 75 years, including 500,000+ categories and over 1 million contributors.
What it doesn't have is the actual film/audio, just an index to the programmes. It's also not comprehensive, excluding most sports, films, imported series, etc.
A librarian thing I suppose.
http://open.bbc.co.uk/catalogue/infax