Matt Maclennan เขียนตอนใด?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What episode was written by Matt Maclennan?It is not neccessary to use all the tables.
 table_27155243_4:  (episode__number [ INTEGER ] written_by [ VARCHAR) ]
SELECT MAX(episode__number) FROM table_27155243_4 WHERE written_by = "Matt MacLennan"