Monarch butterflies visit while on their way to Mexico for their migration, which causes Adam to learn about insect migration and Gilbert to try and book expensive vacations to warmer southern destinations.
Gilbert discovers that he has wings, which means he can fly—at least, he could if he wasn't afraid of heights. As a result, he and Adam decide to take cockroach-flying lessons, but Gilbert mistakenly signs them up for a course on flying jets.
The educational series about a scientist and his cockroach pal opens with a visit from Gilbert's twin brother, Gavin. Adam is shocked to learn that Gavin, unlike Gilbert, isn't animated; and that communicating with him is difficult.