CREATE TABLE table_50505 ("Year" FLOAT, "Show" TEXT, "Season" TEXT, "Episode" TEXT, "Notes" TEXT)

What is the Episode number of Ernest Dickerson in 2009 when the show was dexter?
SELECT "Episode" FROM table_50505 WHERE "Year" = '2009' AND "Show" = 'dexter'
SELECT "Episode" FROM "table_50505" WHERE "Show" = 'dexter' AND "Year" = '2009'