Robot Monster (1953)
Ro-Man: I cannot - yet I must. How do you calculate that? At what point on the graph do "must" and "cannot" meet? Yet I must - but I cannot!
Great One: Earth Ro-Man, you violate the laws of plans. To think for yourself is to be like the hu-man.
Ro-Man: Yes! To be like the hu-man! To laugh! Feel! Want! Why are these things not in the plan?
Great One: You are an extension of the Ro-Man, and a Ro-Man you will remain. Now, I set you into motion. One: destroy the girl. Two: destroy the family. Fail, and I will destroy you!
Great One: Have you made the correction?
Ro-Man: I need guidance, Great One. For the first time in my life, I am not sure.
Great One: You sound like a hu-man, not a Ro-Man. Can you not verify a fact?
Ro-Man: I meshed my LIP with the view-screen auditor, and picked up a count of five.
Great One: Error! Error! There are eight!
Ro-Man: Then the other three still elude me. Is it possible they have a counterpower?
Ro-Man: I am ordered to kill you. I must do it with my hands.
Alice: How is it you're so strong, Ro-Man? It seems impossible.
Ro-Man: We Ro-Mans obtain our strength from the planet Ro-Man, relayed from individual energizers.
Ro-Man: What are you doing alone, girl-child?
Carla: My daddy won't let you hurt me.
Ro-Man: We'll see!
[Roy walks up to the group and collapses]
The Professor: He's dead, and there's nothing we can do.
Ro-Man: Great Guidance, I have a favorable report. I have already eliminated one of them.
Great One: Good.
Ro-Man: Force was necessary. It was a simple matter of strangulation. That leaves four.
Great One: [buzzer sounds] Error! Again! Five!
Ro-Man: Four - and one more on whom I have made an estimate in relation to our strategic reserve. The plan should include one human being for reference in case of unforeseen contingencies.
The Professor's Assistant: I'm bossy? You're so bossy you oughta be milked before you come home at night.
Ro-Man: [confronts Johnny and explains the Ro-Mens' motive for wiping out Earth's population] Your people were getting too intelligent. We could not wait until you were strong enough to attack us; we had to attack you first.
The Professor: He's impervious!
Alice: Unless we find his weak spot!
Ro-Man: Hu-mans, listen to me. Due to an error in calculation, there are still a few of you left.
Johnny: I think you are just a big bully, picking on those smaller than you are!
Ro-Man: Now I will kill you.
The Professor: [during wedding ceremony] Dear Lord, you know I'm not trained for this job...