 In _"Muppet Show, The" (1976) {(#2.12)}_ (qv), a sketch called  "Veterinarians Hospital" makes a joke about  _Arsenic and Old Lace (1944)_ (qv): Nurse Janice: What do you think,  Dr. Bob? Rolf: Simple, its arsenic poisoning. Janice: Arsenic?  Rolf: Sure, just look at this old lace! Nurse Piggy: Arsenic and old  lace? Dr. Bob, Dr. Bob, thats an old show. Rolf: Well, thats an  old shoe! Janice: Well, thats an old joke!