CREATE TABLE table_16175064_3 (season__number VARCHAR2, director_s_ VARCHAR2, series__number VARCHAR2)

What is the season number of the episode directed by Donald Crombie and the series number is 40?
SELECT season__number FROM table_16175064_3 WHERE director_s_ = "Donald Crombie" AND series__number = 40
SELECT "season__number" FROM "table_16175064_3" WHERE "Donald Crombie" = "director_s_" AND "series__number" = 40