- Prof. John Robinson: We trusted our eyes instead of our instruments. In space that can be a dangerous mistake.
- Dr. Zachary Smith: TRY not to let it happen again, please.
- Prof. John Robinson: If you've plotted our position, I want you to give it to me.
- Dr. Zachary Smith: Only if you give me your word you'll use it to get us back to Earth.
- Prof. John Robinson: Why, that's blackmail!
- Dr. Zachary Smith: Call it what you will. I have really no interest in camping out again on some dreary cinder in space.
- Prof. John Robinson: All right, Smith. You win.
- Dr. Zachary Smith: We have a deal?
- Prof. John Robinson: Provided your calculations are correct we have a deal.
- Dr. Zachary Smith: [singing] "We're going back to Earth / To wonderful wonderful Earth / Of all I recall / It's best part of all / In all the universe. / Oh, we're going back to Earth..." We're really going back to Earth! "Of all I recall / It's the best part of all / in all the universe."
- Dr. Zachary Smith: You've broken your solid word of honor, Professor. I warn you, I will not go to Alpha Centauri!
- Maj. Don West: No one says you have to, Smith. Anytime you want, I'll stop the Jupiter 2 and let you off.
- Dr. Zachary Smith: BAH!
- Maj. Don West: John, the fuel gauge in this barge reads down a quarter, but there's no indication that any other ship docked here.
- Prof. John Robinson: Well it's not possible!
- Maj. Don West: Well, SOMETHING'S been at this fuel supply.
- Will Robinson: Maybe it was a leak.
- Prof. John Robinson: If it was, the fuel would still be moving past the barges.
- Dr. Zachary Smith: There is more than one way to skin a cat.
- The Robot: There are exactly thirty-seven ways.
- Dr. Zachary Smith: And I've used them all.
- Dr. Zachary Smith: "Dangerous scientific phenomena" indeed, you blithering booby. What could possibly be out there in all that nothingness?
- [turns to see a green alien watching him and screams]
- Will Robinson: Mom once told me about people who see things. She said they're the cause of a guilty conscience.
- Will Robinson: Dad, where are we going now?
- Prof. John Robinson: We'll know when we get their, son. We'll know when we get there.