At a panel discussion at the Paley Center last night, Ryan Murphy revealed details about Gwyneth Paltrow’s upcoming guest spot on Glee: She’ll play a “terrible†substitute teacher (which doesn’t quite jibe with her being a love interest for Will), sing a song from Chicago, and “scream at a teapot while dressed as Mary Todd Lincoln†(which is obviously some kind of code for a deviant sexual act). [Speakeasy/WSJ]