CREATE TABLE table_23550 ("#" TEXT, "Original title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original airdate" TEXT, "Prod. code" TEXT)

How many directed have the product code of 2.8?
SELECT COUNT("Directed by") FROM table_23550 WHERE "Prod. code" = '2.8'
SELECT COUNT("Directed by") FROM "table_23550" WHERE "Prod. code" = '2.8'