user: Question: When did the season premiere that saw 8.4 million viewers first air?
Columns: ['Season', 'Season premiere', 'Season finale', 'TV season', 'Ranking', 'Viewers (in millions)']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1st', 'January 9, 2000', 'May 21, 2000', '1999–2000', '#18', '15.2']
SQL:

assistant: SELECT "Season premiere" FROM "Table" WHERE "Viewers (in millions)" = '8.4';