user: Question: Which episode did 18.74 million people tune in?
Columns: ['No. in series', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (million)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '" Pilot "', 'David Nutter', 'Bruno Heller', 'September23,2008', '276040', '15.60']
SQL:

assistant: SELECT "Title" FROM "Table" WHERE "U.S. viewers (million)" = '18.74';