Edna didn't die in any specific episode. The Simpsons were oddly indirect about addressing Marcia Wallace's & therefore Edna's death until Season 25's The Man Who Grew Too Much. They were a little more direct when they showed Ned wearing a black armband with a photo of Edna (& Maude) saying to Nelson, "I sure do miss her laugh".
It was in later seasons that they finally showed Edna has a ghost.
Excluding the Halloween episodes, Martin is presumed dead in Dial N for Nerder
The Simpsons creator Matt Groening is 63 years old (birthdate: February 15, 1954).
Episode 280 i think....
End of the Episode 166
series 3, episode 16
episode 7 Season 6 The episode is called "Simpsons already did it" it is not revealed how she died.
In the episode Simpsons Already Did It (episode 7, season 6).
Yes. He died in a future based episode but Professor Frink cloned him.
Excluding the Halloween episodes, Martin is presumed dead in Dial N for Nerder
The Simpsons creator Matt Groening is 63 years old (birthdate: February 15, 1954).
He is going to die in episode 135
episode 1
she does NOT die.
Episode 80 of shippuden
episode 88
Episode 280 i think....
episode 122. :'(