Georgie is an orange Hippopotamus antiquus and children's TV icon who appeared in the Dinosaurs episode "Georgie Must Die." His face and normal "Georgie" voice were both performed by Allan Trautman, his body was puppeteered by Jack Tate and his "Evil Georgie" voice was provided by Edward Asner.
A spoof of Barney the Dinosaur, Georgie is actually a megalomaniac planning to take over the world through his financial empire and the devotion of the dinosaur children. He was then arrested and sent to prison for racketeering and tax evasion after Earl Sinclair exposed him on television. Roy Hess ended up taking his place on TV as the eponymous "Uncle Roy."
A similar character, Blarney, appeared on the series as a hand puppet.