Although there is still some time before "Glee" season 5 reaches its 100th episode the co-creator and executive producer of the show Brad Falchuk shared some spoilers and sentimental aspects about shooting the show without cast member Cory Monteith following his tragic death.

According to Hollywood Life, Falchuk told The Hollywood Reporter that it was difficult for the cast to perform "Don't Stop Believin'" without Monteith who died from an overdose on July 13th.

He said, "It's emotional. It'd odd doing this song without Cory," adding, "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."

Fans may remember that the tune was the first song on "Glee's" season one soundtrack and was performed in the Pilot episode by the original New Direction members which included Rachel (Lea Michele), Finn (Cory Monteith), Artie (Kevin McHale), Tina (Jenna Ushkowitz), Mercedes (Amber Riley) and Kurt (Chris Colfer).

A big focus on the show was Finn and Rachel's relationship which coincidentally translated off screen as Monteith and Michele began dating in real life.

Falchuk admitted that the crew is trying to figure out where to go with the story line following the actor's death.

He explained, "The Rachel-Finn relationship was the show in many ways," adding, "We've talked about it before, about how it represented these two worlds coming together and how it represented these two high school stories about not belonging and people feeling like they belong because they've found each other.

"That's what that relationship is about, and we can't tell that story. We're still going to tell that story, we're just going to find a different way to do it. And we'll do our best."

The 100th episode of "Glee" is set to premiere on Fox, March 18th.

Here's the full list of songs the cast will be performing on the hundredth episode:

-"Keep Holding On:" Puck (Mark Salling)

-"Valerie:" Santana (Naya Rivera) and Brittany (Heather Morris)

-"Defying Gravity:" Rachel, Kurt & Mercedes

-"Raise Your Glass:" Will (Matthew Morrison) and April (Kristin Chenoweth)

-"Toxic:" Santana, Brittany & Quinn (Dianna Agron)

-"Happy:" Holly (Gwyneth Paltrow), April, Will, Blaine (Darren Criss) & Mercedes

-"Party All the Time:" Holly

-"Total Eclipse of the Heart:" Will & April

-"Loser Like Me:" Blaine, Artie, Sam (Chord Overstreet) and Tina

-"Be Okay:" Rachel & Santana

-"I Am Changing:" Mercedes & Kurt

-"Just Give Me a Reason:" Quinn & Puck

-"Don't Stop Believin:" Rachel, Blaine, Kurt, Will, Artie Tina - Emily Longeretta