It Conquered the World1956

Dr. Tom Anderson:
He wants you on his side. Next to me, he wants you.

Paul Nelson:
And you want me to condone this reign of terror? To swear allegiance to this monstrous king of yours? To kill my own soul and all within reach? Well, I won't, Anderson. I'll fight it 'til the last breath in my body. And I'll fight you, too, because you're part of it - the worst part. Because you belong to a living race, not a dying one. This is your land, your world. Your hands are human but your mind is enemy. You're a traitor, Anderson. The greatest traitor of all time. And you know why? Because you're not betraying part of mankind - you're betraying all of it.