CREATE TABLE table_30333 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" FLOAT)

What date did the episode with a production code of 60072 originally air?
SELECT "Original air date" FROM table_30333 WHERE "Production code" = '60072'
SELECT "Original air date" FROM "table_30333" WHERE "Production code" = '60072'