CREATE TABLE table_17489 ("Series #" FLOAT, "Season #" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( millions ) " CLOB)

How many U.S Viewers, in millions, were for series # 26?
SELECT "U.S. viewers (millions)" FROM table_17489 WHERE "Series #" = '26'
SELECT "U.S. viewers (millions)" FROM "table_17489" WHERE "Series #" = '26'