Brad Falchuck (pictured left), the executive producer of hit U.S. musical series 'Glee', has revealed that shooting the show's 100th episode was very emotional without Cory Monteith because they re-recorded the cast's rendition of Journey's 'Don't Stop Believin'. 

Monteith was found dead last summer after a heroin and alcohol overdose and rose to fame as football player Finn Hudson on the programme, and Falchuck explained to The Hollywood Reporter that redoing the song without him was tough:

"It's emotional. It'd odd doing this song without Cory. You notice it. I notice it. There is a feeling when you hear that song and see all those people singing it that you really get a sense of what's come before it."

He added: "It's a life flashes before your eyes type thing. The song is evocative anyway, and then our version becomes personal and when we see them all up there doing it, it's emotional.”

Watch Matthew Morrison, who plays Mr. Schuester on the show, talk about the 100th episode here: