As Papa Smurf, Smurfette, and Handy watch Baby Smurf play around with tiny Smurf figures in a toy village Handy had created for Baby, Nat alerts the village leader to an ecological danger: the Smurf river is polluted, causing strange mutations with the fish that live in the river. The Smurfs detect that the pollution is coming from a runoff on a hill, and so Papa Smurf and Smurfette follow the runoff to its origin -- Gargamel's muckpond. They watch in hiding as the evil wizard dumps all his failed potions into the muckpond, fussing and fuming at how they failed in helping him catch the Smurfs. Then suddenly Azrael finds himself distracted by the Smurfs he sees nearby and chases them all around Gargamel, causing him to fall into the muckpond. As the Smurfs escape, Gargamel spits out the ick