When Boober shows Wembley all of his ointments and medicines, Wembley thinks Boober doesn't have enough fun, and invites him to the garden to play Follow the Leader with the rest of their friends. First Boober accepts, but then he overhears Gobo talking about Boober being a big goof (when really, Gobo's referring to Junior), he gets upset and very hurt, and decides to let Sidebottom out and turns into "Dr. Fun." The other Fraggles worry that Boober's going too far, but when Boober hypnotizes Junior into thinking he's a Fraggle, the fun begins. Then Wembley starts to have an allergic reaction to the Bonkleberry stew, and the situation becomes problematic, and it's time for Dr. Fun to step aside before it's too late. (thetvdb.com)