CREATE TABLE table_22296 ("No. in series" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT)

What is the original air date of the episode with the production code 1115?
SELECT "Original air date" FROM table_22296 WHERE "Production code" = '1115'
SELECT "Original air date" FROM "table_22296" WHERE "Production code" = '1115'