CREATE TABLE table_21844 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT)

Name the original air date for number in season being 1
SELECT "Original air date" FROM table_21844 WHERE "No. in season" = '1'
SELECT "Original air date" FROM "table_21844" WHERE "No. in season" = '1'