user: Question: Name the number of number in series for production code of 06-04-621
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [108.0, 1.0, '"Reese Comes Home: Part 3"', 'Todd Holland', 'Matthew Carlson', 'November 7, 2004', '06-04-602']
SQL:

assistant: SELECT "No. in series" FROM "Table" WHERE "Production code" = '06-04-621';