user: Question: What's the series number of the episode originally viewed by 4.1 million people and written by Douglas Lieblein?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Prod. code', 'Viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [56.0, 1.0, '"He Ain\'t a Hottie, He\'s My Brother"', 'Rich Correll', 'Steven James Meyer', 'November2,2008', '302', '5.5']
SQL:

assistant: SELECT "No. in series" FROM "Table" WHERE "Viewers (millions)" = '4.1' AND "Written by" = 'Douglas Lieblein';