user: Question: Name the viewers for 2.1 rating
Columns: ['Order', 'Episode', 'Airdate', 'Rating', 'Share', 'Rating/Share (18–49)', 'Viewers (millions)', 'Rank (night)']
Types: ['real', 'text', 'text', 'text', 'real', 'text', 'text', 'real']
Sample row: [1.0, '"In This Home on Ice"', 'April 28, 2010', '3.5', 6.0, '1.7/5', '5.25', 8.0]
SQL:

assistant: SELECT "Viewers (millions)" FROM "Table" WHERE "Rating" = '2.1';