CREATE TABLE table_31250 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" FLOAT)

What is the original air date of the episode that was directed by Bruce Seth Green?
SELECT "Original air date" FROM table_31250 WHERE "Directed by" = 'Bruce Seth Green'
SELECT "Original air date" FROM "table_31250" WHERE "Directed by" = 'Bruce Seth Green'