CREATE TABLE table_77847 ("Episode" TEXT, "Air Date" TEXT, "Timeslot" TEXT, "Rating" TEXT, "Share" TEXT, "18\\u201349  ( Rating/Share ) " TEXT, "Viewers  ( m ) " FLOAT, "Rank  ( # ) " TEXT)

What is the timeslot for the episode that aired April 28, 2009?
SELECT "Timeslot" FROM table_77847 WHERE "Air Date" = 'april 28, 2009'
SELECT "Timeslot" FROM "table_77847" WHERE "Air Date" = 'april 28, 2009'