table: 1-10718984-2
columns: No. in series, No. in season, Title, Directed by, Written by, Original air date, U.S. viewers (millions)
Q: What is the number in the season that Marlene Meyer wrote and 20.49 million people watched?
A: SELECT MAX No. in season FROM 1-10718984-2 WHERE Written by = 'Marlene Meyer' AND U.S. viewers (millions) = '20.49'