CREATE TABLE table_24601 ("Season no." FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. Viewers  ( millions ) " CLOB)

What was the number of season number entries that had US Viewers of 12.30 million?
SELECT COUNT("Season no.") FROM table_24601 WHERE "U.S. Viewers (millions)" = '12.30'
SELECT COUNT("Season no.") FROM "table_24601" WHERE "U.S. Viewers (millions)" = '12.30'