S4, E2: "Rollin' on the Riverboat: Part One" -The whole Pteranodon Family takes a rollicking adventure on the Dinosaur Train Riverboat! Buddy and Don vow to spend every minute together, but while Buddy wants to spend all his time investigating the creatures on the river, Don wants to spend all his time playing games and investigating the buffet. Can they come to some kind of agreement?/ "Rollin' on the Riverboat: Part Two" -While still rolling down the river on the Dinosaur Train Riverboat, Grandpa Pteranodon tells Buddy about the Legend of Admiral Globidens - a HUGE Mososaur that supposedly lives on the river, but no one has ever seen. Buddy enlists Dad and Tiny's help to look for Admiral Globidens, but they can't seem to find him. Does Admiral Globidens really exist, or is he just a figment of someone's imagination?