user: Question: Name the number of families for UK30
Columns: ['No. overall', 'No. in series', 'Family/families', 'Location(s)', 'Original air date']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['UK30', 1.0, 'The Hussain Family and The Philip Family', 'Leeds & Dorset', '9February2010']
SQL:

assistant: SELECT COUNT("Family/families") FROM "Table" WHERE "No. overall" = 'UK30';