user: Question: How many millions of U.S viewers watched the episode titled "Mended Hearts"?
Columns: ['No. in Series', 'Title', 'Directed by', 'Written by', 'Original air date', 'U.S. viewers (millions)']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '"Pilot"', 'John Gray', 'John Gray', 'September23,2005', '11.25']
SQL:

assistant: SELECT "U.S. viewers (millions)" FROM "Table" WHERE "Title" = '"Mended Hearts"';