CREATE TABLE table_27218002_1 (written_by VARCHAR, originalairdate VARCHAR)

Name the total number of written by for 26 july 2010
SELECT COUNT(written_by) FROM table_27218002_1 WHERE originalairdate = "26 July 2010"
SELECT COUNT("written_by") FROM "table_27218002_1" WHERE "26 July 2010" = "originalairdate"