Dr. Zachary Smith: No planet could have an orbit like this. Not even this woebegone, flea-bitten chunk of depressed galactic real estate.
Dr. Zachary Smith: [radioing the chariot] Turn back at once before it's too late. You're in terrible danger. You've got to believe me.
Prof. John Robinson: Smith, this is Robinson. Now why on earth should we believe you?
Dr. Zachary Smith: May I remind you, my dear sir, that we are no longer "on Earth."
Prof. John Robinson: Oh, that's very clever.
Dr. Zachary Smith: And unless you turn around and come back right now, you won't survive another hour.
The Robot: Outside temperature: 59 degrees Fahrenheit and rising.
Dr. Zachary Smith: I've known people to make conversation about the weather, but this is ridiculous.
Maj. Don West: You know, I've got a feeling this stuff's got a message for us if we could only read it.
Judy Robinson: What is it?
Maj. Don West: Well, it's just a piece of vegetation.
Prof. John Robinson: We found lots of this frozen solid in the ground.
Maureen Robinson: Well, it looks as though it's been charred.
Prof. John Robinson: It has.
Maureen Robinson: Burned and then frozen?
Prof. John Robinson: Mm-hm.
Maureen Robinson: Well, that doesn't make sense, does it?
Prof. John Robinson: Darling, very little on this planet makes sense, by Earth standard.
Will Robinson: Where's Dad?
Maj. Don West: He's been working most of the night on that tin monster. Hey, uh, you're pretty fond of that robot, aren't you?
Maj. Don West: I hope you're not gonna pay attention to anything from that robot.
Prof. John Robinson: We'd better. This is orbital data on this planet.
Maj. Don West: [laughs derisively] Who's data? Smith's!
Prof. John Robinson: It explains everything - the terrible cold and sudden rise in temperature. Here, look.
Prof. John Robinson: [sticks two pegs in the sand then draws around them] Here's this planet. This is its sun. Now the orbit of this planet is nothing like the Earth's orbit. It's a flat ellipse, and the sun isn't in the center. It's over here on this leg.
Will Robinson: Then we must have been at this end, away from the sun. That means we're heading in back in close to it now, is that what Dr. Smith tried to warn us about?
Prof. John Robinson: That's right, Will. In a matter of hours we're gonna be in danger of roasting alive. And there's no time to get back to the ship. We're gonna have to build a shelter right here!
Maj. Don West: Do you mean to say you're going to pay ANY attention to what Smith says after all he's done?
Prof. John Robinson: Who cares WHAT he's done? These are facts!
Maj. Don West: Are they? The man's a pathological liar. Now, what makes you think he's suddenly reformed? You think he'd lift a finger to save our lives? Now, we were headed south. I say we keep going that way.
Prof. John Robinson: And you're in no position to give orders.
Maj. Don West: Oh, and you are? It's too bad there isn't judgement to go along with that self-confidence.
Prof. John Robinson: Now that's enough out of you. Whether you like it or not I'm gonna try to save your life along with the others. We get that shelter rigged NOW!
Will Robinson: Boy, Dad, you really read HIM out.
Maj. Don West: [explaining why he's dismantling the robot] That ice we crossed is a full-fledged sea by now. If we're going to sail the chariot across it, I want to make sure EVERYTHING'S battened down, and that includes THIS animated hunk of machinery.
Maj. Don West: [at sea, while tossed about] What's wrong?
Prof. John Robinson: [clicking the controls of the chariot] It won't respond.
Maj. Don West: We're not getting any power. Must be a loose connection in the solar batteries. I'll go up and see if I can fix 'em.
Judy Robinson: Now?
Prof. John Robinson: We can't risk it.
Maj. Don West: Have to. Without power we'll capsize.
Prof. John Robinson: It's too late. We're right in the middle of it.
Maj. Don West: John, we can't wait.
Maureen Robinson: John, you know he's right.