CREATE TABLE table_17272 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Musical guest and song" TEXT, "Original air date" TEXT, "Production code" TEXT)

What is theoriginal air date of the episode directed by timothy van patten?
SELECT "Original air date" FROM table_17272 WHERE "Directed by" = 'Timothy Van Patten'
SELECT "Original air date" FROM "table_17272" WHERE "Directed by" = 'Timothy Van Patten'