Follow the Leader / Bill's Broken Promise

S1 E319: On a hot summer day, the four friends are playing Follow the Leader – only it’s more like, Follow the Rocky. The little parasaur doesn’t want to let anyone else lead, even when the dinos have to help poor old Ayati cool off in the heat. / It’s Rocky’s birthday! Bill, Mazu and Tiny are planning a big party for him. But after Bill lets out a secret about Rocky’s present, and the young brachio finds he must invite the scariest guest of all to the party: Gigantosaurus!