Title is probably confusing, so let me try to explain. Every now and then a show or movie boasts an appearance by an actor (often uncredited) that would normally be considered significantly under the actor's skill. Robin Williams, for instance, did Whose Line Is It Anyway and The Adventures of Baron Munchausen. Whoopi Goldberg also did Whose Line. Several movie A-Listers were on the phone during Frasier's run.
Is there a particular movie or show that includes an unexpected appearance of a star well beyond the show's talent that resonates will with you?