CREATE TABLE table_18569389_1 (no_in_series VARCHAR, us_viewers__million_ VARCHAR)

Name the total number for number in series that got 3.62 viewers
SELECT COUNT(no_in_series) FROM table_18569389_1 WHERE us_viewers__million_ = "3.62"
SELECT COUNT("no_in_series") FROM "table_18569389_1" WHERE "3.62" = "us_viewers__million_"