Dry Hard / BFF R.I.P / MoefingerLisa is playing hide and seek with Janey before the latter is killed by a lawn mower. At Janey's funeral, Sherri and Terri decide to let Lisa be their friend before they are immediately crushed by a falling tombstone. After Lisa's therapist is also killed under mysterious circumstances, Chief Wiggum suspects her to be the murderer, and Lisa realizes her imaginary friend, "Rachel" (voiced by Sarah Silverman) has returned and is killing anyone close to her so she can be Lisa's only friend. The next day on the school bus, Milhouse Van Houten is asphyxiated by Rachel, and Lisa is arrested for the murder. In jail, Lisa mentions that her mother was right about Rachel, which convinces her to kill Marge Simpson and everyone Lisa cares about. But after Lisa escapes jail with Bart's help, she confronts Rachel as she plans to kill Marge. Homer can see Rachel because he is drunk, and his imaginary friend Sergeant Sausage attempts to defeat Rachel but is killed. Lisa manages to drive off Rachel by threatening to use her imagination on her to turn her into a middle-aged woman and marrying her to a dentist and she fades never to be seen again. The final scene has Homer eating the remains of "Sergeant Sausage", who reappears and states that imaginary friends cannot die.