user: Question: What is the number in the season that Marlene Meyer wrote and 20.49 million people watched?
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: [145.0, 4.0, '" Fannysmackin\' "', 'Richard J. Lewis', 'Dustin Lee Abraham', 'October12,2006', '21.85']
SQL:

assistant: SELECT "No. in season" FROM "Table" WHERE "Written by" = 'Marlene Meyer' AND "U.S. viewers (millions)" = '20.49';