- 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!
- The Professor's Assistant: I'm bossy? You're so bossy you oughta be milked before you come home at night.
- 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: [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.
- 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!
- 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.
- Great One: [his last line, when "Extension XJ-2" can't bring himself to kill Alice] You wish to be a human? Good. You can DIE like a human!
- [Takes out XJ-2 with another Cosmic Blast, then...]
- Great One: Human elements still roam Planet Earth! I, the ruler of the Ro-Men, shall send our Cosmic J-Rays... from which will spring prehistoric reptiles to devour whatever remains of life! Next, Psychotronic vibrations will smash the Planet Earth out of the universe!
- [Young Johnny wakes from his nightmare just in time to prevent this from happening]
- The Professor: [during wedding ceremony] Dear Lord, you know I'm not trained for this job...
- Alice, The Professor's Assistant: [under their breath] You could say that again.