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Simon is assigned with caring for a snake named Rosie at home for a week, but Dave's phobia of snakes presents a dilemma, so Simon creates a robotic clone of Rosie in an attempt to help Dave conquer his fear.
After learning about King Arthur, Theodore starts a round table, but he secretly does not want Alvin to join.
Alvin never accepts the responsibility of his short comings and misdeeds, instead always blaming them on either of his brothers, which angers them and Dave.