CREATE TABLE table_25763 ("No. in series" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( millions ) " TEXT)

Who wrote the episode with production code 1AJN05?
SELECT "Written by" FROM table_25763 WHERE "Production code" = '1AJN05'
SELECT "Written by" FROM "table_25763" WHERE "Production code" = '1AJN05'