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For TV shows that lose a star like Luke Perry, there's no perfect way to say goodbye

(CNN)"Glee" was on a regularly scheduled hiatus in 2013 when one of its young stars, Cory Monteith, died of an accidental overdose. The cast and crew began production on the show's fifth season just weeks later, first filming two previously written episodes as planned and then a special episode that was a moving tribute to the 31-year-old actor, who played Finn Hudson. At the time, showrunner Ryan Murphy, then a veteran of series like "Nip/Tuck" and "Popular," admitted he was in "uncharted water." Monteith played not just a major character on the uber-buzzy teen drama but one half of the show's main couple, opposite Lea Michele. "What I loved about it is when you write something like that [tribute special], there's no right way to do it," ...