CREATE TABLE table_24929 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

How many viewers tuned in for season 2?
SELECT "U.S. viewers (million)" FROM table_24929 WHERE "No. in season" = '2'
SELECT "U.S. viewers (million)" FROM "table_24929" WHERE "No. in season" = '2'