Complex sentence: It is the 39th overall episode of the series and is written and directed by series creator Jonathan Nolan, it aired on CBS (TV channel) in the United States and CTV in Canada on February 21st, 2013.
Split into simpler sentences: It is the 39th overall episode of the series and is written and directed by series creator Jonathan Nolan. It aired on CBS in the United States and on CTV in Canada on February 21st, 2013.