The Big Blow-Up is the second part of the eighth episode of Arthur season 2. The Big Blow-Up aired on November 10, 1997. It aired with the episode "Arthur vs. the Piano".
Francine and the Brain have a dispute over soccer practice that carries into class and through the next soccer match. They may not make the playoffs if it continues. Arthur and Buster use D.W.'s idea of writing an early letter to Santa to resolve things between Francine and the Brain with fake apology letters.