There was also precedent for a Muppet episode of a mainstream sci-fi/fantasy show in an "Angel" episode called "Smile Time" from 2004. In that episode, the titular vampire (David Boreanaz ...

The vampire Angelus, now known as Angel, has a human soul, but committed terrible crimes in the past. Seeking forgiveness and trying to redeem himself, he moves from Sunnydale (and a relationship ...

Seasonal Muppet movie in which Miss Piggy and the gang ... Kermit wonders if he is of any use to the others. It takes an angel to show him what their lives would be like if he had never existed ...