user: ### NOW ANSWER:
Question: When was the show first aired that was viewed by 3.57 million U.S. viewers?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [68.0, 1.0, '"The Same Deep Water as You"', 'Greg Prange', 'Mark Schwahn', 'September27,2006', '3T5751', '3.64']
SQL:

assistant: SELECT "Original air date" FROM "Table" WHERE "U.S. viewers (millions)" = '3.57';