Jack is a little taken aback that Robert/ Bob quickly wants to find a way to destroy Nitte's zombies. What for? To help Keith so Keith can break into the chemistry plant? And let Keith take chemistry weapons out? Jack wonders what his friend is thinking.
Keith looks at Jack, "Do you know a way to kill all those zombies? I am sure you do."
Jack wants to lie about this for now, "Well, yeah. I probably know. But I don't remember right now. I need to brush up on the details. Let me go home and find my books. I'm sure the answers can be found there, I just don't remember right now."
Bob then says, "Well, Keith, why don't you keep an eye on all the dead bodies for now. I'm sure Nitte hasn't got everything figured out yet. Jack says Nitte needs the correct spell to wake them up. Plus, there is no need for to summon an army of zombies any time soon."