CREATE TABLE table_14035132_3 (original_air_date VARCHAR, storyboarded_by VARCHAR, no_in_series VARCHAR)

On what date did the episode with a series number 31, with a story written by William Reiss, air for the first time?
SELECT original_air_date FROM table_14035132_3 WHERE storyboarded_by = "William Reiss" AND no_in_series = "31"
SELECT "original_air_date" FROM "table_14035132_3" WHERE "31" = "no_in_series" AND "William Reiss" = "storyboarded_by"