CREATE TABLE table_29686 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "U.S. viewers  ( millions ) " CLOB, "Original U.S. air date" CLOB, "Prod. code" CLOB)

who were the writers in the episode whose production code was 411?
SELECT "Written by" FROM table_29686 WHERE "Prod. code" = '411'
SELECT "Written by" FROM "table_29686" WHERE "Prod. code" = '411'