CREATE TABLE table_20046379_3 (original_air_date VARCHAR2, no_in_series VARCHAR2)

On how many different dates did the episode with series number 35 air for the first time?
SELECT COUNT(original_air_date) FROM table_20046379_3 WHERE no_in_series = "35"
SELECT COUNT("original_air_date") FROM "table_20046379_3" WHERE "35" = "no_in_series"