CREATE TABLE table_24075 ("Episode" CLOB, "Broadcast date" CLOB, "Run time" CLOB, "Viewers  ( in millions ) " CLOB, "Archive" CLOB)

On broadcast date is 21march1970, how many people tuned in?
SELECT COUNT("Viewers (in millions)") FROM table_24075 WHERE "Broadcast date" = '21March1970'
SELECT COUNT("Viewers (in millions)") FROM "table_24075" WHERE "Broadcast date" = '21March1970'