user: Question: What is the highest series number with 9.17 million US viewers?
Columns: ['No. in Series', 'No. in Season', 'Title', 'Directed by', 'Written by', 'Original air date', 'U.S. viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [88.0, 1.0, '"Homecoming"', 'Michael Morris', 'David Marshall Grant & David Babcock', 'September26,2010', '9.47']
SQL:

assistant: SELECT MAX("No. in Series") FROM "Table" WHERE "U.S. viewers (millions)" = '9.17';