CREATE TABLE table_19394 ("No. in series" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT)

What was the airdate of the episode that was directed by giancarlo volpe and written by is john o'bryan?
SELECT "Original air date" FROM table_19394 WHERE "Directed by" = 'Giancarlo Volpe' AND "Written by" = 'John O''Bryan'
SELECT "Original air date" FROM "table_19394" WHERE "Directed by" = 'Giancarlo Volpe' AND "Written by" = 'John O\'Bryan'