CREATE TABLE table_26259391_1 (us_viewers__million_ VARCHAR, written_by VARCHAR)

how many u.s. viewers (million) have seen a production written by chris sheridan & danny smith
SELECT COUNT(us_viewers__million_) FROM table_26259391_1 WHERE written_by = "Chris Sheridan & Danny Smith"
SELECT COUNT("us_viewers__million_") FROM "table_26259391_1" WHERE "Chris Sheridan & Danny Smith" = "written_by"