user: Question: how many million u.s. viewers watched the episode directed by Dan Lerner?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (million)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [24.0, 1.0, '"Redemption"', 'Chris Long', 'Bruno Heller', 'September24,2009', '3X5351', '15.07']
SQL:

assistant: SELECT "U.S. viewers (million)" FROM "Table" WHERE "Directed by" = 'Dan Lerner';