This may very well be the silliest Lost in Space episode of all time—and once seen, "The Great Vegetable Rebellion" can never be forgotten. The Jupiter 2 is travelling through space. On board, the Robinson party is celebrating the Robot's birthday. Dr. Smith decides to take the space pod down to a planet that they are passing to get him some flowers as a birthday gift. In so doing, Smith incurs the wrath of Tybo (Stanley Adams) a giant carrot who represents a race of highly intelligent (and very hostile) plants. As punishment for Smith's infraction, Tybo decides to transform the Robinsons into an assortment of plant life.