Disney's Adventures of the Gummi Bears Season 5 Episode 4 Bridge on the River Gummi Episode Title:Bridge on the River Gummi.Episode Description:When an old bridge that Grammi and Sunni use to run on errand collapses, Gusto convinces Gruffi to build a bigger, more elaborate bridge, Igthorn, however, takes advantage of the new bridge on transport his new weapon to Dunwyn.