CREATE TABLE table_73636 ("Episode number Production number" CLOB, "Title" CLOB, "Original airdate" CLOB, "Rating/Share in Households" CLOB, "18\\u201349 Rating Live+SD / Live+7" CLOB, "Share" CLOB, "Live+SD Total viewers" CLOB, "Live+7 Day DVR Total viewers" CLOB)

When did the fourth episode of the season (4 1-04) first air?
SELECT "Original airdate" FROM table_73636 WHERE "Episode number Production number" = '4 1-04'
SELECT "Original airdate" FROM "table_73636" WHERE "Episode number Production number" = '4 1-04'