CREATE TABLE table_2866503_1 (us_viewers__million_ VARCHAR, written_by VARCHAR)

How many millions of viewers are listed where the writer is Matthew Okumura?
SELECT us_viewers__million_ FROM table_2866503_1 WHERE written_by = "Matthew Okumura"
SELECT "us_viewers__million_" FROM "table_2866503_1" WHERE "Matthew Okumura" = "written_by"