Glee-Monteith Tribute.jpg

In this undated image released by Fox, cast members, from left, Amber Riley, Cory Monteith and Lea Michele perform during a scene from "Glee." The series will pay tribute to Monteith on a special episode of the Fox musical drama on Thursday, Oct. 10. The 31-year-old Monteith was found dead in a hotel room in Canada last July. Tests showed his death was caused by a mixture of heroin and alcohol. (AP Photo/Fox, Adam Rose, File)