In The Simpsons‘ first episode since the death of long-time cast member Marcia Wallace, the Fox animated series opened and closed the episode with tributes to the actress, who played Bart’s teacher Mrs. Krabappel from 1990 until her death. Bart wrote  “We’ll really miss you Mrs. K” on the chalkboard in the opening credits, while a photo of Mrs. Krabappel, with the caption, “In loving memory of Marcia Wallace,” closed out the episode. Wallace died on October 25 at age 70. Her character is expected to be retired after the series runs out of pre-recorded episodes with Wallace.