Patrick Troughton credited as playing...
Dr. Who
- Zoe: How did you pilot the rocket, Doctor?
- Dr. Who: I don't think we've met have we?
- Dr. Gemma Corwyn: Zoe... Doctor... John Smith, isn't it?
- [the Doctor looks about for Dr. John Smith]
- Jamie: [pushing the Doctor a little bit to get his attention] John... John...
- [the Doctor realises that John Smith is himself]
- Dr. Who: [pushing the Doctor a little bit to get his attention] John... John...
- [the Doctor realises that John Smith is himself]
- Zoe: I'm an astrophysicist. Pure-mathematics major.
- Dr. Gemma Corwyn: With honors.
- Dr. Who: Oh, I am impressed.
- Dr. Gemma Corwyn: We use Zoe as our second opinion.
- Zoe: [to the Doctor] You didn't answer my question.
- Dr. Who: What question?
- Jamie: [to Zoe] You know, I surprised you didn't know the answer. Now, don't tell me there is something you can't work out!
- Zoe: [to the Doctor] How did you pilot the rocket ship? You see, I've calculated its original course. It was a surface and supply station for Number Five Station, overdue and presumed lost nine weeks ago. Well the rocket couldn't have drifted eighty seven million miles off course.
- Dr. Who: So what's your theory?
- Zoe: Well, there is a record of the last contract with the Silver Carrier rocket. It had seven million miles to touchdown, and enough fuel for twenty million. Well, it couldn't have drifted here off course in the time involved. It must have been driven and piloted.
- Jamie: Och, you are a right wee space-detective!
- Zoe: There's only one solution. That rocket was re-fuelled in space. - Provided for at least with another twelve fuel rods.
- Dr. Who: Well, it is an interesting theory...
- Zoe: Oh, it isn't a theory. You can't disprove the facts. It's pure logic.
- Dr. Who: Logic, my dear Zoe, merely enables one to be wrong with authority. Supposing there was a faulty automatic pilot?
- Zoe: To drive a rocket eighty seven million miles on fuel for twenty million?
- Dr. Who: Well, it's a possibility.
- Zoe: That rocket was driven here somehow. I know it was.
- Zoe: The X-rays are processed now. Can you turn the light out, Jamie?
- [Jamie turns out the lights]
- Dr. Who: Here we go. Now, let's see what we've got.
- [an image of a Cybermat is projected on the wall]
- Zoe: What's that?
- Dr. Who: It's a Cybermat!
- Jamie: Aye!
- Dr. Who: The lights, Jamie, the lights!
- [the lights come back on]
- Dr. Who: Cybermats!
- Jamie: That means the Cybermen must be here, too!
- Dr. Who: Yes... And there's only one place they can be. - On that rocket!