- Cmdr. John Koenig: [after seeing a hallucinating Alan] What's all this about?
- Dr. Helena Russell: Hallucination, disorientation - classic symptoms of radiation sickness. He *has* been affected.
- Cmdr. John Koenig: But that's not possible! The instruments cleared him!
- Dr. Helena Russell: Well, they're wrong - and they're probably wrong about you, too.
- Cmdr. John Koenig: Helena... look, the man's been unconscious, dreaming, maybe having a nightmare...
- Dr. Helena Russell: That was no nightmare.
- Cmdr. John Koenig: Now how the hell can you be so sure?
- Dr. Helena Russell: Because I know my job. Look, except for Alan, both you and Paul have had the greatest exposure.
- Cmdr. John Koenig: Look, I'm not hallucinating. Okay, maybe, maybe my reaction was a bit hasty, but so is your assessment!
- Dr. Helena Russell: My "assessment" is based on experience, and with no help from the clock. Extensive tests take time, John. Look, I think he has been affected, and if I'm right, then you've got to be suspect, too.
- Cmdr. John Koenig: Now, look, Helena...
- [his comm buzzes]
- Cmdr. John Koenig: Yes, Paul?
- Paul Morrow: Reconnaisance Eagle is ready on Pad 4. Co-pilot Pierre Daniel is standing by.
- Cmdr. John Koenig: Thanks, Paul, but I'm going alone.
- Dr. Helena Russell: You're not going out again!
- Cmdr. John Koenig: Don't worry, I'll wear my galoshes.
- [first lines]
- Paul Morrow: Eagle Two-Nine approaching asteroid, commander. Eagle Ten descending with nuke.
- [last lines]
- Dr. Helena Russell: John, I'm sorry.
- Cmdr. John Koenig: You were right. Totally right. If you had done anything else, I'd want to know why.
- Dr. Helena Russell: But...
- Cmdr. John Koenig: But nothing. Helena, if you went out to that spaceship and came back with a crazy story like I did, I'd be a fool not to lock you up. How could anyone possibly know that a planet on a collision course would not collide but simply touch?