When does Mr. Young return?

Mr. Young is a Canadian television series that premiered on March 1, 2011, on YTV. Set between 2010 and 2014, the show follows the lives of the students and faculty of Finnegan High over a four-year period. The series was created by Dan Signer, who also worked on Disney Channel series such as The Suite Life on Deck and A.N.T. Farm.
Adam Young is a child prodigy who graduated from university at the age of 14. He decides to come back to high school as a science teacher. He reunites with childhood best friend Derby (Gig Morton) and encounters the school bully, Slab (Kurt Ostlund), and a student in his class whom he has a crush on, named Echo (Matreya Fedor)