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They have yet to address it-
Keep in mind she passed away last week, and the show tapes 4-6 weeks in advance they havent had a chance to address it. Spoilers say Murphy and Katherine (off screen) go on a fishing trip out of town and when she returns she passes away in her sleep, this should happen within a month or so. In the meantime they are doing a special episode on May 28th were 25 actors on the show will gather together to do a one hour tribute to Jeanne, they will relay messages to her and reflect back on her life, the funeral takes place in June. According to spoilers for the funeral, Corben Bernsen (her real life son) is coming back as Father Todd to direct the funeral, man thats got to hit really close to home for the guy, he loses his mother and has to come back to relive those memories.