The Simpsons is welcoming another member of the Mad Man cast to Springfield: Elisabeth Moss will voice a character on Fox's animated classic this fall, Vulture can exclusively report. According to showrunner Al Jean, "She'll play a character stuck in an elevator who gives birth to a baby. She names it Homer, Jr." (Peggy Olson is pregnant again!) For you detailed-oriented Simpsons diehards, the episode's title is "Labor Pains," Moss's character is named "Gretchen," and Fox is tentatively scheduled to broadcast the episode on November 13 as part of the show's 25th season. The Simpsons long ago established its love for Mad Men: Both Jon Hamm and John Slattery have lent their voices to the show, while this 2008 parody of the AMC drama's opening credits was pretty much perfect.