CREATE TABLE table_28979 ("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)

What is the series number of the episode 'Fly'?
SELECT COUNT("No. in series") FROM table_28979 WHERE "Title" = 'Fly'
SELECT COUNT("No. in series") FROM "table_28979" WHERE "Title" = 'Fly'