The Simpsons said a sad farewell to Bart's teacher Edna Krabappel on Sunday night; Mrs. Krabappel (more recently Mrs. Flanders, since she married Ned) was voiced by Marcia Wallace, who recently lost her battle with cancer.
In a brief scene at the very end, and before the closing credits, Mrs Krabappel and her husband, Ned Flanders, are dancing a passionate tango together and then we see him mourning at home, alone wearing a black armband. Even Nelson Muntz, an altogether unlikely source, remarks on how much he will miss her laugh.
I realize that it dates me, but I remember her very well as the receptionist on the Bob Newhart Show (wiki), and later on Hollywood Squares (wiki).
via Daily Mail.