CREATE TABLE table_21859 ("Episode" FLOAT, "Original title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original airdate" CLOB, "Duration" CLOB, "Viewership" CLOB)

How many episodes aired on 22january2009
SELECT COUNT("Episode") FROM table_21859 WHERE "Original airdate" = '22January2009'
SELECT COUNT("Episode") FROM "table_21859" WHERE "Original airdate" = '22January2009'