Does anybody know how to find out what a programme on Discovery channel is about?

If the +s ymbol is clicked on the listings in most cases the message "No programme details" is displayed. On other Discovery channels this message is invariably displayed.

Is there website anywhere which has details of Discovery programmes?

Even though I subscribed to all the Discovery channels I don't watch any of them very much because there appears to be no way of finding out what a programme is about.

David