CREATE TABLE table_42739 ("Season" TEXT, "Ep #" FLOAT, "Season Premiere" TEXT, "Season Finale" TEXT, "Ranking" TEXT, "Viewers  ( Households in millions ) " TEXT, "Rating" TEXT)

How many million viewers watched the season finale on March 12, 1979?
SELECT "Viewers (Households in millions)" FROM table_42739 WHERE "Season Finale" = 'march 12, 1979'
SELECT "Viewers (Households in millions)" FROM "table_42739" WHERE "Season Finale" = 'march 12, 1979'