The wildlife show visits one of the most hostile environments of all - the city. Presenter Simon King discovers creatures that thrive on rusting cars, and rats stalking the streets.

(Repeated next Saturday)

Information: see Ceefax page 624. BBC Wildlife magazine, or access the Internet: the URL address is: [url address removed] or record the closing titles and playback on stop frame. You can E-mail your information on: [email address removed] or call the phoneline on [number removed] (calls cost 39p per minute cheap rate and 49p per minute at other times, maximum two and a half minutes)