user: Question: How many episodes had the us viewers (millions) figure of 5.0?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'US viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [112.0, 1.0, '"Valhalley of the Dolls (Part 1)"', 'James L. Conway', 'Brad Kern', 'September28,2003', 4301112.0, '6.3']
SQL:

assistant: SELECT COUNT("No. in season") FROM "Table" WHERE "US viewers (millions)" = '5.0';