Question: When did Dr. Marvin Monroe die?
Answer: Dr. Marvin Monroe, a character much-disliked by some of the writers, passed away quietly sometime during the season. His death was marked only by the appearance of the Marvin Monroe Memorial Hospital in "Who Shot Mr. Burns?, Part 1."
In the 2004 episode, "Diatribe of a Mad Housewife," Dr. Marvin Monroe appears briefly, saying he's been sick when Marge asks where he's been.
