CREATE TABLE table_20920 ("Series #" FLOAT, "Season #" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "U.S. viewers  ( millions ) " CLOB)

Who wrote Season 8?
SELECT "Written by" FROM table_20920 WHERE "Season #" = '8'
SELECT "Written by" FROM "table_20920" WHERE "Season #" = '8'