CREATE TABLE table_2899 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( millions ) " TEXT)

How many season numbers are there for the episode seen by 13.54 million people in the US?
SELECT COUNT("No. in season") FROM table_2899 WHERE "U.S. viewers (millions)" = '13.54'
SELECT COUNT("No. in season") FROM "table_2899" WHERE "U.S. viewers (millions)" = '13.54'