How many episodes were in the 1 st season of Glee ?
The final twelve episodes of the season are collected on " Glee : Season 2 , Volume 2 " , which was released in the US on September 13 , 2011 , and includes several special features such as " Building " Glee " Auditorium " with Cory Monteith and " Shooting " Glee " in New York City " .