- Penny Robinson: Oh, I'm sorry, Dr. Smith. Did I scare you?
- Dr. Zachary Smith: No, my child. That's already been done.
- Dr. Zachary Smith: Sunstroke, cosmic psychosis, what difference does it make what I've got? Oh, for such a thing to strike now, to strike the finest mind in the universe, to strike me at my very richest moment. Oh, go away, child, and leave me in peace.
- The Boy: I used to have this cat, and she used to go out and bring all kind of things back, and then, one time, she met this tomcat on the other side. I haven't seen her since.
- The Boy: Stay here. Forever isn't such a long time. You'll like it and you'll never have to grow old.
- The Boy: This isn't really a world. I just said that. You see, everybody's got a world, but this is a dimension, which is much better than a world. Anyone can tell you that.
- Prof. John Robinson: [as the cosmic storm subsides] That frame... it looks like metal. Lucky it wasn't hit. You see, we have no idea of knowing what cosmic bolts do to strange metals.
- Dr. Zachary Smith: But it's only, uh, worthless tin and lead, mighty poor conductors.
- Prof. John Robinson: With alien materials, all sorts of strange changes can occur, mysterious forces released.
- Maj. Don West: Uh, what're you looking for?
- Dr. Zachary Smith: Uh... my, uh... my heating pad. I loaned it to Mrs. Robinson the other day. She seems to have mislaid it.
- Maj. Don West: Well, that's all right because I got something that'll fix your back up just great.
- Dr. Zachary Smith: Oh, good.
- Maj. Don West: Yeah, it's an old-fashioned restorative instrument.
- Dr. Zachary Smith: Ah, yes.
- Maj. Don West: You will just love this. This is exactly what you need. A shovel.
- Maj. Don West: Last night, Dr. Smith, we almost lost our lives because of you, so you're gonna make up for it.
- Judy Robinson: A full-length mirror, just what we needed. Which reminds me, you promised to help me fix my hair.
- Penny Robinson: Oh, no. Not again.
- Judy Robinson: Thought I'd try it a little bit higher on top with perhaps a softer curl.
- Penny Robinson: You and your hairdos. I'm gonna cut all my hair off, just like Will's.
- Judy Robinson: Go ahead. Be ugly. Who cares?
- Judy Robinson: I wish you'd fix yourself up once in awhile. I don't like to see you going around, well, acting like a boy. You know what I mean.
- Penny Robinson: What's wrong with boys?
- Judy Robinson: Well, nothing, but you could be so beautiful.
- Maj. Don West: Judy? What's the matter with Penny?
- Judy Robinson: She's not crying, is she?
- Maj. Don West: No, she's just lost to the world. I asked her what time it was and she said "Maybe I left it in the control room."
- Penny Robinson: I thought you said you cleaned it up a little.
- The Boy: Well, I DID! All except the dirt, and that doesn't hurt anybody.
- The Boy: In here you don't have to wash your face. You don't have to brush your teeth. You don't have to do anything 'cept have fun.
- Dr. Zachary Smith: [sweetly] Can you hear me, Penny dear? You know that was a dreadful thing you did to me, making me think I was sick and seeing things, but I'll forgive you. You can come out of your hiding place now.
- Dr. Zachary Smith: [suddenly angry and threatening] Come out of here; I'm warning you!
- The Boy: Penny, how did he get in here? D'you let him in here?
- Dr. Zachary Smith: No-no, of course not, my boy. I'm the one who let YOU in. Don't you understand?
- The Boy: He's goofy.
- Penny Robinson: Dr. Smith, there's an awful beast running around here.
- Dr. Zachary Smith: A beast? Yes, of course. I WOULD think of something like that, wouldn't I?
- Penny Robinson: Dr. Smith, do you feel all right?
- Dr. Zachary Smith: Yes, I do, surprisingly enough. Ohhh. What a fascinating place I've created here for you.
- Dr. Zachary Smith: Now-now, my dear. There's noting to be frightened of. You're not really here. And neither is he.