Episode 710 : Sing a Song of Superheroes There ' s a problem with the water pipes , so the Muppet Babies imagine themselves as opera - singing superheroes and figure out what is wrong . Plot . The Babies are imagining themselves sailing on the ocean , sparring between two ships : one under the command of Captain Kermit , and the other under the control of pirate captain Baby Gonzo . Outside of their fantasy , Baby Fozzie , who has been standing watch in the boat ' s lookout , spots a UPS truck making a delivery outside the Nursery . Nanny accepts the package at the door , rejecting the babies ' theories as to what it might . It ' s a videotape she ' d sent for , " The Greatest Moments in the History of Opera " . The babies immediately lose their enthusiasm and Skeeter sighs , " bo - ring . " Nanny disagrees : " opera heroes were the great superheroes of their day ! " Another letter informs them that the water in the neighborhood has been turned off , so Nanny resigns to watching her new video in the TV room . The babies decline the invitation , " We ' ve got a lot of playing to do in the nursery , " Kermit says . Nanny exits humming " La donna è mobile " . Pondering over the implications of no running water , Baby Scooter ( underscored by " The Marriage of Figaro " ) reports on a variety of water sports , starting with coverage of Skeeter going over a waterfall in a metal barrel . The siblings spar through song , with antagonist lyrics set to Amilcare Ponchielli ' s " Dance of the Hours " . Halfway down the falls ( underscored by the beginning on " The Toreador Song " ) , Skeeter ' s descent is halted because the water has been turned off . Back in their pirate fantasy , the babies sing their own version of " Habanera " from Bizet ' s " Carmen " . The song comes to a halt when a squeaky valve is turned , shutting off the water to the ocean , and freezing their pirate ship at the crest of a wave . Fozzie speculates that the ocean may have forgotten to pay its water bill . In Venice , Baby Gonzo sings another rendition of " La donna è mobile " as a gondolier with Baby Piggy as his passenger . Finding themselves thirsty , they row over to a faucet only to have a cloud of dust emerge . The water drains from Venice as well as the babies ' other fantasies , and — underscored by " The Marriage of Figaro " — they surmise that all the water is gone . Suffering the fate of a dry world , the babies find themselves in a barren desert , singing their own lyrics to Verdi ' s " Anvil Chorus " . Gonzo resolves to go find the water , suggesting they all split up to search . As they continue through the desert , the song shifts to the " Ranz des vaches " movement from the " William Tell Overture " with new lyrics . After Skeeter dives into a swimming pool that turns out to be a mirage , Gonzo arrives at Batman ( or , rather , Batboy ) in the Batmobile singing his own lyrics to the " March of the Swiss Soldiers " movement , again from " William Tell " . Batboy transports the Babies to Gotham City to track down the missing water . He opens a door to uncover the thief , but reveals a clip from " The Three Stooges " instead , so heads back to the Batmobile where Piggy has been left behind . Kermit suggests they ' re going to need more than one superhero , so he , Fozzie , Baby Animal , Baby Bean Bunny , and Baby Rowlf emerge from the sewer as the Teenage Mutant Ninja Turtles and sing their own version of " Largo al factotum " from " The Barber of Seville " . On the rooftops , Skeeter and Scooter appear as the Wonder Twins , touch their rings together , and take on the form of a Scootercopter and pilot ( after transforming into a pair of red high - heeled shoes ) . Meanwhile , Gonzo and Piggy have tracked the water thief down as the Phantom of the Opera . Underscored by the " Prelude to Act III " from Richard Wagner ' s " Lohengrin " , all the babies — in their superhero personae — infiltrate the opera house to apprehend the culprit . On the run from the Phantom , Piggy has freed herself from the Batmobile and arrives on horseback singing her own version of " Ride of the Valkyries " . Their chase after the villain turns to the real world where the water man speaks to them through the front door of Nanny ' s house to tell them that the water has been turned back on . In victory , the babies sing " The Toreador Song " with their own lyrics . Nanny catches the end of their performance and notes that they must like opera after all . Fozzie says maybe next week they ' ll shut their air off and they can learn to like brussel sprouts . After the credits , back in the desert , Fozzie and Kermit spot Animal in a flying car , bidding the audience , " Go bye - bye ! "