Dr. Karl Weigand: Any matter, therefore, that the crab eats will be assimilated in its body as solid energy, becoming part of the crab.
Martha Hunter: Like the bodies of the dead men?
Dr. Karl Weigand: Yes - and their brain tissue, which, after all, is nothing more than a storage house for electrical impulses.
Dale Drewer: That means that the crab can eat his victim's brain, absorbing his mind intact and working.
Dr. Karl Weigand: It's as good a theory as any other to explain what's happened.
Martha Hunter: But, Doctor, that theory doesn't explain why Jules' and Carson's minds have turned against us.
Dale Drewer: Preservation of the species. Once they were men; now they are land crabs.