The Doctor: You don't just collect this stuff, you scavenge it.
Henry Van Statten: This technology has been falling to Earth for centuries. All it took was the right mind to use it properly. Oh, the advances I've made from alien junk. You have no idea, Doctor. Broadband? Roswell. Just last year, my scientists cultivated bacteria from the Russian crater and do you know what we found? The cure for the common cold. Kept it strictly within the laboratory, of course. No need to get people excited. Why sell one cure when I can sell a thousand palliatives?
The Doctor: Do you know what a Dalek is, Van Statten? A Dalek is honest. It does what it was born to do for the survival of its species. That creature in your dungeon is better than you.