user: ### NOW ANSWER:
Question: What episode in the season was episode US18 in the series?
Columns: ['No. in series', 'No. in season', 'Family/families', 'Location(s)', 'Original air date']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['US11', 1.0, 'The Minyon Family', 'West Chester, OH', '23September2005']
SQL:

assistant: SELECT COUNT("No. in season") FROM "Table" WHERE "No. in series" = 'US18';