The three main characters were Hoppity Hooper, a plucky frog, voiced by Chris Allen; Waldo P. Wigglesworth, a patent medicine-hawking fox, voiced by Hans Conried, who posed as Hoppity's long-lost uncle in the pilot episode; and Fillmore, a bear wearing Civil War clothes and (poorly) playing his bugle, voiced by Bill Scott (with Alan Reed portraying the character in the pilot).