CREATE TABLE table_3433 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Director" TEXT, "Writer ( s ) " TEXT, "Airdate" TEXT)

How many people directed the episode that aired on February 5, 1968?
SELECT COUNT("Director") FROM table_3433 WHERE "Airdate" = 'February 5, 1968'
SELECT COUNT("Director") FROM "table_3433" WHERE "Airdate" = 'February 5, 1968'