user: Question: What is the season # when ther are 5.3 million U.S viewers?
Columns: ['Series #', 'Season #', 'Title', 'Directed by', 'Written by', 'Original air date', 'Prod. code', 'U.S. viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [79.0, 1.0, '"Raven, Sydney and the Man"', 'Rich Correll', 'Marc Warren', 'February20,2006', 403.0, '4.5']
SQL:

assistant: SELECT "Season #" FROM "Table" WHERE "U.S. viewers (millions)" = '5.3';