“Glee” co-creator Ryan Murphy told reporters at a Paley Center event in Los Angeles on Wednesday night that the show will end next year after its sixth season. He also confessed that he must alter his plan for the final moments of the series. The death of actor Cory Monteith, who played Finn, changed the course of the narrative. “I knew what the last shot was — he was in it,” Murphy said at the event, which honored the FX network. “. . . So when a tragedy like that happens you sort of have to pause and figure out what you want to do.” (Monteith, 31, died of a drug overdose in July.) “Glee” was co-created by a local guy — Brad Falchuk — who also worked with Murphy on “Nip/Tuck” and on the current FX hit, “American Horror Story.” Falchuck just inked a three-year deal with Fox to continue working on the shows and to develop more projects, according to The Hollywood Reporter. A longtime passionate Red Sox fan (and a Beaver Country Day School alum), Falchuk was just back home in Boston to see the team beat the Tigers. He tweeted a pic from Fenway Park on Sunday of his brother Evan Falchuk, who’s running for governor as the founder of the United Independent Party.