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Cory Monteith’s untimely death in July 2013 rocked the worlds of his family, friends, fans, and the entire cast and crew of Glee. This was just recently emphasized when Ryan Murphy (the show’s creator) talked to Entertainment Weekly about what life was like on the set of Glee following Monteith’s death. And it sounds like things got pretty dark.

When the show premiered in 2009, it was an instant hit. Murphy said that the level of sudden fame was akin to what The Beatles experienced as they skyrocketed.

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But along with the insane amount of success (including soundtracks, tours, and a concert film) came a huge amount of tension.

But the closeness wasn’t the only major issue to happen on the Glee set. Murphy eventually learned of Monteith’s struggle with addiction, and he helped him get checked into rehab.

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Unfortunately, rehab wasn’t enough to save Monteith. He tragically died from a heroine overdose in 2013.

The last time Murphy ever saw Monteith was when he came to visit the set of The Normal Heart with Lea Michele.

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Murphy admitted that Monteith’s death changed the show in a huge way — it took a dark turn.

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As fans of the show, it was impossible not to feel the darkness that became of Glee. The loss was certainly felt by everyone and certainly still is.