user: ### NOW ANSWER:
Question: What episode titles have 17.93 million U.S. viewers?
Columns: ['Series #', 'Season #', 'Title', 'Directed by', 'Written by', 'Original air date', 'U.S. viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [71.0, 1.0, '"Showdown"(Part 2)', 'John F. Showalter', 'David Amann', 'September29,2005', '20.98']
SQL:

assistant: SELECT "Title" FROM "Table" WHERE "U.S. viewers (millions)" = '17.93';