As Glee enters production on its Cory Monteith memorial episode, the show's cast is having a difficult time saying goodbye to their former co-star.

Kevin McHale, who plays Artie on the series, revealed to TVLine in a Sunday report that the tribute to Monteith and his character Finn is very powerful.

"There are so many incredibly well-written and powerful scenes," McHale revealed. "When [the cast] got the script, we were all reading it together and we were like, 'Did you get to that one scene.' And when you see it everyone will know what that one scene is."

McHale added that the characters will react in different ways to Finn's death, explaining that his fellow cast members "are having to play reactions that they obviously would not feel in real-life, and that's a weird thing to play.

"Because you want people to know how you actually feel," he added. "But [Ryan Murphy & Co. are staying true to] the characters, and that's the smart thing to do."

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Many of the characters will be in denial after hearing the news of Finn's death, the actor added. Some will try to avoid dealing with the loss, which McHale said is very different in regards to how the actors took in the news.

"It's a difficult thing because in real life none of us were like that," he continued. "We were all very much dealing with it."

Monteith/Finn's memorial episode will be the third in Glee season 5 and will be called The Quarterback, named after Finn's position in football. The episode will begin with the characters learning about Finn's death and their subsequent reactions. Rachel (Lea Michele) will only appear in the final act of the episode.

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The episode is set to air on Oct. 10. Season 5 of Glee premieres on Thursday, Sept. 26 at 9 p.m. on Fox.

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Glee, Glee Season 5, Glee season 5 spoilers, Glee season 5 news, Cory Monteith