CREATE TABLE table_27836 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT)

How many episodes directed by david carson?
SELECT COUNT("No. in season") FROM table_27836 WHERE "Directed by" = 'David Carson'
SELECT COUNT("No. in season") FROM "table_27836" WHERE "Directed by" = 'David Carson'