Who's the Smartest?

Victoria, Tyler and Melody of "The Brainy Bunch" go up against Ethan, Devananda and Connor of "The Superlatives." In a "Genius Junior" first, siblings will face off against one another - twins Tyler and Ethan. In the Human GPS round, contestants must memorize the New York City subway routes, before moving on to Number Cruncher, Talking Dictionary, Memory Master and ultimately "The Cortex," the ultimate test of all-around smarts.