A representative of an alien race that went through drastic evolution to survive its own climate change, Klaatu comes to Earth to assess whether humanity can prevent the environmental damage they have inflicted on their own planet. When barred from speaking to the United Nations, he decides humankind shall be exterminated so the planet can survive.
For Rod Kimble, performing stunts is a way of life, even though he is rather accident-prone. Poor Rod cannot even get any respect from his stepfather, Frank, who beats him up in weekly sparring matches. When Frank falls ill, Rod devises his most outrageous stunt yet to raise money for Frank's operation -- and then Rod will kick Frank's butt.
The owner of a bank (Miss Bitterman) wants to own the Muppet Theatre so she can build a nightclub over it. After she tricks Pepe into giving her the only copy of the contract between her father and the Muppets, she changes it so the Muppets have very little time to pay a debt they owe. Meanwhile, the Muppets are trying to put on a Christmas show. After the Muppets are confronted by Bitterman, they make a lot of sacrifices to save up so they can keep the Theatre.
