CREATE TABLE table_21025437_2 (episode_no VARCHAR, written_by VARCHAR)
SELECT COUNT(episode_no) FROM table_21025437_2 WHERE written_by = "Kirstie Falkous & John Regier"
Kirstie Falkous และ John Regier เขียนบททั้งหมดกี่ตอน
How many episodes were written by Kirstie Falkous & John Regier?