CREATE TABLE table_31053 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT)

Who wrote episode number 11?
SELECT "Written by" FROM table_31053 WHERE "No. in season" = '11'
SELECT "Written by" FROM "table_31053" WHERE "No. in season" = '11'