The fourth season of Degrassi: The Next Generation commenced airing in Canada on 7 September 2004, concluded on 14 February 2005 and contains twenty-two episodes. Degrassi: The Next Generation is a Canadian serial teen drama television series. This season depicts the lives of a group of high school sophomores and juniors as they deal with some of the challenges and issues teenagers face such as bullying, dysfunctional families, school shootings, mental disorders, STDs, disabilities, gambling, homosexuality, and inappropriate student-teacher relationships.