CREATE TABLE table_73554 ("No. in series" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( in millions ) " TEXT)

How many directed by have 2.80 as u.s. viewers (in millions)?
SELECT COUNT("Directed by") FROM table_73554 WHERE "U.S. viewers (in millions)" = '2.80'
SELECT COUNT("Directed by") FROM "table_73554" WHERE "U.S. viewers (in millions)" = '2.80'