CREATE TABLE table_30972 ("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  ( millions ) " TEXT)

How many episodes are 122 in the series?
SELECT COUNT("No. in season") FROM table_30972 WHERE "No. in series" = '122'
SELECT COUNT("No. in season") FROM "table_30972" WHERE "No. in series" = '122'