I think Dr.shumway is arrogant its her way or no way.Unless she figure outs what somebody is trying to tell her.Also Sargent web is just out to get the creedles. Another  detail is that Isadora is very intelligent because almost has an answer for every thing.Also uncle Bud is intelligent to because he knows how to make rocket ships.Jack needs to think things through a little more.Grady is is a bully to Jack he is always trying to hurt Jack.