CREATE TABLE table_18007 ("No." FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

What is the Original air date for the episode written by Peter Ocko?
SELECT "Original air date" FROM table_18007 WHERE "Written by" = 'Peter Ocko'
SELECT "Original air date" FROM "table_18007" WHERE "Written by" = 'Peter Ocko'