Dumbstruck

T.J.'s IQ takes a dive after he's accidentally on the head by a couple of wood planks while helping Marcus and Mo stack some 2x4s, allowing him to act more his age. Marcus decides to step up and become the smarter brother for the first time, which he finds to be hard. However when T.J.'s intelligence reappears while in class one day, he decides to continue acting dumb, realizing the benefits as he is no longer getting picked on by classmates and fits in with Marcus and Mo. But T.J. eventually reveals his intelligence is back, when he, Marcus and Mo are in danger of failing after Marcus begins to panic after he forgets the facts on his report, during the trio's oral presentation on World War II.