user: Question: What date did episode 15 of the season originally air?
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', 'real', 'text']
Sample row: [67.0, 1.0, '"Charmed Again (Part 1)"', 'Michael Schultz', 'Brad Kern', 'October4,2001', 4301801.0, '6.0']
SQL:

assistant: SELECT "Original air date" FROM "Table" WHERE "No. in season" = 15.0;